Inline getFreeStack and mention 2.5.0 helper method

Update password UI

[ImgBot] optimizes images

* revise first-time-use screen
* generate password (policy applies)
* hide/reveal password text for sta/admin settings
* changed autocomplete='...' for some inputs to avoid completion

* Fix env size formatting
* Windows support for ota.py
* Sort queue by board to speed up compilation
* Safeguard .pioenvs/elfs

*Total -- 5,085.22kb -> 3,964.07kb (22.05%)

/images/devices/geiger_scope_single_pulse.png -- 37.57kb -> 12.97kb (65.49%)
/images/devices/geiger_scope_following_pulses.png -- 39.24kb -> 14.18kb (63.86%)
/images/devices/geiger_espurna_configuration.png -- 246.97kb -> 122.93kb (50.23%)
/images/devices/geiger_espurna_status.png -- 324.66kb -> 166.03kb (48.86%)
/images/devices/geiger_grafana_dashboard.png -- 457.05kb -> 263.05kb (42.45%)
/images/devices/geiger_wiring_diagram.png -- 1,912.29kb -> 1,399.95kb (26.79%)
/images/devices/generic-geiger-diy.png -- 148.03kb -> 128.88kb (12.94%)
/images/devices/itead-sonoff-ifan02.jpg -- 13.15kb -> 11.55kb (12.15%)
/images/devices/mancavemade-esp-live.jpg -- 9.40kb -> 8.75kb (6.91%)
/images/devices/generic-ag-l4-3.jpg -- 231.74kb -> 216.98kb (6.37%)
/images/devices/generic-ag-l4-2.jpg -- 233.96kb -> 221.09kb (5.5%)
/images/devices/generic-ag-l4-1.jpg -- 200.47kb -> 189.93kb (5.26%)
/images/devices/generic-ag-l4-5.jpg -- 141.25kb -> 134.08kb (5.08%)
/images/devices/generic-ag-l4-4.jpg -- 165.97kb -> 157.64kb (5.01%)
/images/devices/workchoice-ecoplug.jpg -- 8.18kb -> 7.81kb (4.47%)
/images/devices/kmc-70011.jpg -- 9.19kb -> 8.79kb (4.38%)
/images/devices/schuko-wifi-plug.jpg -- 8.53kb -> 8.17kb (4.25%)
/images/devices/arilux-e27.jpg -- 26.28kb -> 25.28kb (3.8%)
/images/devices/intermittech-quinled-2.6.jpg -- 28.71kb -> 27.63kb (3.75%)
/images/devices/xenon-sm-pw702u.jpg -- 25.33kb -> 24.57kb (3%)
/images/devices/openenergymonitor-mqtt-relay.jpg -- 12.01kb -> 11.69kb (2.62%)
/images/devices/generic-v9261f.jpg -- 11.72kb -> 11.42kb (2.55%)
/images/devices/heygo-hy02.jpg -- 8.42kb -> 8.23kb (2.22%)
/images/devices/itead-slampher.jpg -- 14.88kb -> 14.57kb (2.12%)
/images/devices/neo-coolcam-wifi.jpg -- 13.18kb -> 13.02kb (1.19%)
/images/devices/itead-sonoff-dual.jpg -- 11.68kb -> 11.56kb (1.08%)
/images/devices/lingan-swa1.jpg -- 10.42kb -> 10.31kb (1.08%)
/images/devices/wion-50055.jpg -- 13.43kb -> 13.30kb (0.96%)
/images/devices/tonbux-powerstrip02.jpg -- 6.17kb -> 6.12kb (0.85%)
/images/devices/itead-s20.jpg -- 10.34kb -> 10.27kb (0.72%)
/images/devices/lohas-9w.jpg -- 14.33kb -> 14.23kb (0.72%)
/images/devices/itead-sonoff-4ch.jpg -- 9.50kb -> 9.44kb (0.56%)
/images/devices/itead-sonoff-pow.jpg -- 10.26kb -> 10.21kb (0.51%)
/images/devices/itead-sonoff-th.jpg -- 10.93kb -> 10.87kb (0.48%)
/images/devices/authometion-lyt8266.jpg -- 12.96kb -> 12.91kb (0.41%)
/images/devices/itead-sonoff-b1.jpg -- 13.40kb -> 13.35kb (0.39%)
/images/devices/huacanxing-h801.jpg -- 13.92kb -> 13.86kb (0.38%)
/images/devices/magichome-led-controller.jpg -- 15.67kb -> 15.62kb (0.34%)
/images/devices/itead-s26.jpg -- 17.73kb -> 17.67kb (0.34%)
/images/devices/itead-bn-sz01.jpg -- 15.80kb -> 15.75kb (0.33%)
/images/devices/itead-sonoff-led.jpg -- 16.03kb -> 15.97kb (0.33%)
/images/devices/arilux-al-lc01.jpg -- 16.07kb -> 16.02kb (0.33%)
/images/devices/electrodragon-wifi-iot.jpg -- 16.34kb -> 16.29kb (0.32%)
/images/devices/itead-sonoff-basic.jpg -- 16.40kb -> 16.35kb (0.32%)
/images/devices/itead-sonoff-4ch-pro.jpg -- 17.51kb -> 17.46kb (0.3%)
/images/devices/itead-sonoff-rf.jpg -- 18.77kb -> 18.71kb (0.28%)
/images/devices/itead-sonoff-t1.jpg -- 19.36kb -> 19.31kb (0.27%)
/images/devices/aithinker-ai-light.jpg -- 20.41kb -> 20.36kb (0.26%)
/images/devices/arilux-al-lc06.jpg -- 21.36kb -> 21.31kb (0.25%)
/images/devices/itead-sonoff-sv.jpg -- 22.08kb -> 22.03kb (0.24%)
/images/devices/itead-motor.jpg -- 23.11kb -> 23.06kb (0.23%)
/images/devices/itead-1ch-inching.jpg -- 24.33kb -> 24.28kb (0.22%)
/images/devices/generic-relay-40.jpg -- 26.88kb -> 26.82kb (0.2%)
/images/devices/exs-wifi-relay-v31.jpg -- 30.11kb -> 30.06kb (0.18%)
/images/devices/wemos-d1-mini-relayshield.jpg -- 30.27kb -> 30.21kb (0.17%)
/images/devices/witty-cloud.jpg -- 30.68kb -> 30.63kb (0.17%)
/images/devices/jorgegarcia-wifi-relays.jpg -- 30.79kb -> 30.74kb (0.17%)
/images/devices/generic-rgbled-10.jpg -- 35.41kb -> 35.36kb (0.15%)
/images/devices/jangoe-wifi-relay.jpg -- 37.46kb -> 37.41kb (0.14%)
/images/devices/tinkerman-espurna-h.jpg -- 43.03kb -> 42.98kb (0.12%)
/images/devices/nodemcu-lolin-v3.jpg -- 74.11kb -> 74.06kb (0.07%)

Rename cont_t for Core 2.4.2 and higher

Add new device - iWoole Smart LED Table Lamp

Another sync

sync to upstream

Define HOMEASSISTANT_PAYLOAD_AVAILABLE for payload_available

WakeUp PMSX003 sensor on first reading cycle

This is the Info main menu (aka directory node).
A few useful Info commands:

  'q' quits;
  '?' lists all Info commands;
  'h' starts the Info tutorial;
  'mTexinfo RET' visits the Texinfo manual, etc.

* Menu:

Basics
* Common options: (coreutils)Common options.
* Coreutils: (coreutils).       Core GNU (file, text, shell) utilities.
* Date input formats: (coreutils)Date input formats.
* Ed: (ed).                     The GNU line editor
* File permissions: (coreutils)File permissions.
                                Access modes.
* Finding files: (find).        Operating on files matching certain criteria.

C++ libraries
* autosprintf: (autosprintf).   Support for printf format strings in C++.

Compression
* Gzip: (gzip).                 General (de)compression of files (lzw).

Development
* SSIP: (ssip).                 Speech Synthesis Interface Protocol.
* Speech Dispatcher: (speech-dispatcher).
                                Speech Dispatcher.
* libffi: (libffi).             Portable foreign-function interface library.

DOS
* Mtools: (mtools).             Mtools: utilities to access DOS disks in Unix.

Editors
* nano: (nano).                 Small and friendly text editor.

General Commands
* Screen: (screen).             Full-screen window manager.

GNU Gettext Utilities
* autopoint: (gettext)autopoint Invocation.
                                Copy gettext infrastructure.
* envsubst: (gettext)envsubst Invocation.
                                Expand environment variables.
* gettextize: (gettext)gettextize Invocation.
                                Prepare a package for gettext.
* gettext: (gettext).           GNU gettext utilities.
* ISO3166: (gettext)Country Codes.
                                ISO 3166 country codes.
* ISO639: (gettext)Language Codes.
                                ISO 639 language codes.
* msgattrib: (gettext)msgattrib Invocation.
                                Select part of a PO file.
* msgcat: (gettext)msgcat Invocation.
                                Combine several PO files.
* msgcmp: (gettext)msgcmp Invocation.
                                Compare a PO file and template.
* msgcomm: (gettext)msgcomm Invocation.
                                Match two PO files.
* msgconv: (gettext)msgconv Invocation.
                                Convert PO file to encoding.
* msgen: (gettext)msgen Invocation.
                                Create an English PO file.
* msgexec: (gettext)msgexec Invocation.
                                Process a PO file.
* msgfilter: (gettext)msgfilter Invocation.
                                Pipe a PO file through a filter.
* msgfmt: (gettext)msgfmt Invocation.
                                Make MO files out of PO files.
* msggrep: (gettext)msggrep Invocation.
                                Select part of a PO file.
* msginit: (gettext)msginit Invocation.
                                Create a fresh PO file.
* msgmerge: (gettext)msgmerge Invocation.
                                Update a PO file from template.
* msgunfmt: (gettext)msgunfmt Invocation.
                                Uncompile MO file into PO file.
* msguniq: (gettext)msguniq Invocation.
                                Unify duplicates for PO file.
* ngettext: (gettext)ngettext Invocation.
                                Translate a message with plural.
* xgettext: (gettext)xgettext Invocation.
                                Extract strings into a PO file.

GNU organization
* Maintaining Findutils: (find-maint).
                                Maintaining GNU findutils

GNU Utilities
* dirmngr-client: (gnupg).      X.509 CRL and OCSP client.
* dirmngr: (gnupg).             X.509 CRL and OCSP server.
* gpg: (gnupg1).                OpenPGP encryption and signing tool (v1).
* gpg-agent: (gnupg).           The secret key daemon.
* gpg2: (gnupg).                OpenPGP encryption and signing tool.
* gpgsm: (gnupg).               S/MIME encryption and signing tool.

Individual utilities
* aclocal-invocation: (automake-1.15)aclocal Invocation.
                                                Generating aclocal.m4.
* arch: (coreutils)arch invocation.             Print machine hardware name.
* automake-invocation: (automake-1.15)automake Invocation.
                                                Generating Makefile.in.
* base32: (coreutils)base32 invocation.         Base32 encode/decode data.
* base64: (coreutils)base64 invocation.         Base64 encode/decode data.
* basename: (coreutils)basename invocation.     Strip directory and suffix.
* bibtex: (web2c)bibtex invocation.             Maintaining bibliographies.
* cat: (coreutils)cat invocation.               Concatenate and write files.
* chcon: (coreutils)chcon invocation.           Change SELinux CTX of files.
* chgrp: (coreutils)chgrp invocation.           Change file groups.
* chmod: (coreutils)chmod invocation.           Change access permissions.
* chown: (coreutils)chown invocation.           Change file owners and groups.
* chroot: (coreutils)chroot invocation.         Specify the root directory.
* cksum: (coreutils)cksum invocation.           Print POSIX CRC checksum.
* cmp: (diffutils)Invoking cmp.                 Compare 2 files byte by byte.
* comm: (coreutils)comm invocation.             Compare sorted files by line.
* cp: (coreutils)cp invocation.                 Copy files.
* csplit: (coreutils)csplit invocation.         Split by context.
* cut: (coreutils)cut invocation.               Print selected parts of lines.
* date: (coreutils)date invocation.             Print/set system date and time.
* dd: (coreutils)dd invocation.                 Copy and convert a file.
* df: (coreutils)df invocation.                 Report file system disk usage.
* diff: (diffutils)Invoking diff.               Compare 2 files line by line.
* diff3: (diffutils)Invoking diff3.             Compare 3 files line by line.
* dir: (coreutils)dir invocation.               List directories briefly.
* dircolors: (coreutils)dircolors invocation.   Color setup for ls.
* dirname: (coreutils)dirname invocation.       Strip last file name component.
* du: (coreutils)du invocation.                 Report on disk usage.
* dvicopy: (web2c)dvicopy invocation.           Virtual font expansion
* dvitomp: (web2c)dvitomp invocation.           DVI to MPX (MetaPost pictures).
* dvitype: (web2c)dvitype invocation.           DVI to human-readable text.
* echo: (coreutils)echo invocation.             Print a line of text.
* env: (coreutils)env invocation.               Modify the environment.
* expand: (coreutils)expand invocation.         Convert tabs to spaces.
* expr: (coreutils)expr invocation.             Evaluate expressions.
* factor: (coreutils)factor invocation.         Print prime factors
* false: (coreutils)false invocation.           Do nothing, unsuccessfully.
* find: (find)Invoking find.                    Finding and acting on files.
* fmt: (coreutils)fmt invocation.               Reformat paragraph text.
* fold: (coreutils)fold invocation.             Wrap long input lines.
* gftodvi: (web2c)gftodvi invocation.           Generic font proofsheets.
* gftopk: (web2c)gftopk invocation.             Generic to packed fonts.
* gftype: (web2c)gftype invocation.             GF to human-readable text.
* groups: (coreutils)groups invocation.         Print group names a user is in.
* gunzip: (gzip)Overview.                       Decompression.
* gzexe: (gzip)Overview.                        Compress executables.
* head: (coreutils)head invocation.             Output the first part of files.
* hostid: (coreutils)hostid invocation.         Print numeric host identifier.
* hostname: (coreutils)hostname invocation.     Print or set system name.
* id: (coreutils)id invocation.                 Print user identity.
* install: (coreutils)install invocation.       Copy files and set attributes.
* join: (coreutils)join invocation.             Join lines on a common field.
* kill: (coreutils)kill invocation.             Send a signal to processes.
* link: (coreutils)link invocation.             Make hard links between files.
* ln: (coreutils)ln invocation.                 Make links between files.
* locate: (find)Invoking locate.                Finding files in a database.
* logname: (coreutils)logname invocation.       Print current login name.
* ls: (coreutils)ls invocation.                 List directory contents.
* md5sum: (coreutils)md5sum invocation.         Print or check MD5 digests.
* mf: (web2c)mf invocation.                     Creating typeface families.
* mft: (web2c)mft invocation.                   Prettyprinting Metafont source.
* mkdir: (coreutils)mkdir invocation.           Create directories.
* mkfifo: (coreutils)mkfifo invocation.         Create FIFOs (named pipes).
* mknod: (coreutils)mknod invocation.           Create special files.
* mktemp: (coreutils)mktemp invocation.         Create temporary files.
* mltex: (web2c)MLTeX.                          Multi-lingual TeX.
* mpost: (web2c)mpost invocation.               Creating technical diagrams.
* mv: (coreutils)mv invocation.                 Rename files.
* nice: (coreutils)nice invocation.             Modify niceness.
* nl: (coreutils)nl invocation.                 Number lines and write files.
* nohup: (coreutils)nohup invocation.           Immunize to hangups.
* nproc: (coreutils)nproc invocation.           Print the number of processors.
* numfmt: (coreutils)numfmt invocation.         Reformat numbers.
* od: (coreutils)od invocation.                 Dump files in octal, etc.
* paste: (coreutils)paste invocation.           Merge lines of files.
* patch: (diffutils)Invoking patch.             Apply a patch to a file.
* patgen: (web2c)patgen invocation.             Creating hyphenation patterns.
* pathchk: (coreutils)pathchk invocation.       Check file name portability.
* pktogf: (web2c)pktogf invocation.             Packed to generic fonts.
* pktype: (web2c)pktype invocation.             PK to human-readable text.
* pltotf: (web2c)pltotf invocation.             Property list to TFM.
* pooltype: (web2c)pooltype invocation.         Display WEB pool files.
* pr: (coreutils)pr invocation.                 Paginate or columnate files.
* printenv: (coreutils)printenv invocation.     Print environment variables.
* printf: (coreutils)printf invocation.         Format and print data.
* ptx: (coreutils)ptx invocation.               Produce permuted indexes.
* pwd: (coreutils)pwd invocation.               Print working directory.
* readlink: (coreutils)readlink invocation.     Print referent of a symlink.
* realpath: (coreutils)realpath invocation.     Print resolved file names.
* rm: (coreutils)rm invocation.                 Remove files.
* rmdir: (coreutils)rmdir invocation.           Remove empty directories.
* runcon: (coreutils)runcon invocation.         Run in specified SELinux CTX.
* sdiff: (diffutils)Invoking sdiff.             Merge 2 files side-by-side.
* seq: (coreutils)seq invocation.               Print numeric sequences
* sha1sum: (coreutils)sha1sum invocation.       Print or check SHA-1 digests.
* sha2: (coreutils)sha2 utilities.              Print or check SHA-2 digests.
* shred: (coreutils)shred invocation.           Remove files more securely.
* shuf: (coreutils)shuf invocation.             Shuffling text files.
* sleep: (coreutils)sleep invocation.           Delay for a specified time.
* sort: (coreutils)sort invocation.             Sort text files.
* split: (coreutils)split invocation.           Split into pieces.
* stat: (coreutils)stat invocation.             Report file(system) status.
* stdbuf: (coreutils)stdbuf invocation.         Modify stdio buffering.
* stty: (coreutils)stty invocation.             Print/change terminal settings.
* sum: (coreutils)sum invocation.               Print traditional checksum.
* sync: (coreutils)sync invocation.             Synchronize memory to disk.
* tac: (coreutils)tac invocation.               Reverse files.
* tail: (coreutils)tail invocation.             Output the last part of files.
* tangle: (web2c)tangle invocation.             WEB to Pascal.
* tee: (coreutils)tee invocation.               Redirect to multiple files.
* test: (coreutils)test invocation.             File/string tests.
* tex: (web2c)tex invocation.                   Typesetting.
* tftopl: (web2c)tftopl invocation.             TFM -> property list.
* time: (time).                                 Run programs and summarize
                                                  system resource usage.
* timeout: (coreutils)timeout invocation.       Run with time limit.
* touch: (coreutils)touch invocation.           Change file timestamps.
* tr: (coreutils)tr invocation.                 Translate characters.
* true: (coreutils)true invocation.             Do nothing, successfully.
* truncate: (coreutils)truncate invocation.     Shrink/extend size of a file.
* tsort: (coreutils)tsort invocation.           Topological sort.
* tty: (coreutils)tty invocation.               Print terminal name.
* uname: (coreutils)uname invocation.           Print system information.
* unexpand: (coreutils)unexpand invocation.     Convert spaces to tabs.
* uniq: (coreutils)uniq invocation.             Uniquify files.
* unlink: (coreutils)unlink invocation.         Removal via unlink(2).
* updatedb: (find)Invoking updatedb.            Building the locate database.
* uptime: (coreutils)uptime invocation.         Print uptime and load.
* users: (coreutils)users invocation.           Print current user names.
* vdir: (coreutils)vdir invocation.             List directories verbosely.
* vftovp: (web2c)vftovp invocation.             Virtual font -> virtual pl.
* vptovf: (web2c)vptovf invocation.             Virtual pl -> virtual font.
* wc: (coreutils)wc invocation.                 Line, word, and byte counts.
* weave: (web2c)weave invocation.               WEB to TeX.
* who: (coreutils)who invocation.               Print who is logged in.
* whoami: (coreutils)whoami invocation.         Print effective user ID.
* xargs: (find)Invoking xargs.                  Operating on many files.
* yes: (coreutils)yes invocation.               Print a string indefinitely.
* zcat: (gzip)Overview.                         Decompression to stdout.
* zdiff: (gzip)Overview.                        Compare compressed files.
* zforce: (gzip)Overview.                       Force .gz extension on files.
* zgrep: (gzip)Overview.                        Search compressed files.
* zmore: (gzip)Overview.                        Decompression output by pages.

Kernel
* GRUB: (grub).                 The GRand Unified Bootloader
* grub-dev: (grub-dev).         The GRand Unified Bootloader Dev
* grub-install: (grub)Invoking grub-install.
                                Install GRUB on your drive
* grub-mkconfig: (grub)Invoking grub-mkconfig.
                                Generate GRUB configuration
* grub-mkpasswd-pbkdf2: (grub)Invoking grub-mkpasswd-pbkdf2.
* grub-mkrelpath: (grub)Invoking grub-mkrelpath.
* grub-mkrescue: (grub)Invoking grub-mkrescue.
                                Make a GRUB rescue image
* grub-mount: (grub)Invoking grub-mount.
                                Mount a file system using GRUB
* grub-probe: (grub)Invoking grub-probe.
                                Probe device information
* grub-script-check: (grub)Invoking grub-script-check.

Libraries
* RLuserman: (rluserman).       The GNU readline library User's Manual.

Man-pages
* Latex2man: (latex2man).       Its Man-Page

Math
* bc: (bc).                     An arbitrary precision calculator language.
* dc: (dc).                     Arbitrary precision RPN "Desktop Calculator".

Network applications
* Wget: (wget).                 Non-interactive network downloader.

Programming
* flex: (flex).                 Fast lexical analyzer generator (lex
                                  replacement).
* gnucash: (gnucash-design).    Design of the GnuCash program

Programming Tools
* Gperf: (gperf).               Perfect Hash Function Generator.

Software development
* Autoconf Archive: (autoconf-archive).
                                A collection of re-usable Autoconf macros.
* Automake: (automake-1.15).    Making GNU standards-compliant Makefiles.

Sound
* SSIP: (ssip).                 Speech Synthesis Interface Protocol.
* Say for Speech Dispatcher: (spd-say).
                                Say.
* Speech Dispatcher: (speech-dispatcher).
                                Speech Dispatcher.

TeX
* DVI-to-PNG: (dvipng).         Translating TeX DVI files to Portable Network
                                  Graphics (PNG).
* DVI-to-Postscript: (dvips).   Translating TeX DVI files to PostScript.
* Eplain: (eplain).             Expanding on plain Tex.
* EpsPDF: (epspdf).             Portable GUI- and command-line EPS/PS/PDF
                                  conversion
* Kpathsea: (kpathsea).         File lookup along search paths.
* LaTeX2e: (latex2e).           Unofficial LaTeX reference manual.
* LaTeX2e-es: (latex2e-es).     Manual de extraoficial de LaTeX.
* Naming TeX fonts: (fontname). Filenames for TeX fonts.
* TL-build: (tlbuild).          TeX Live configuration and development.
* TeX Directories: (tds).       A directory structure for TeX files.
* TeXdraw: (texdraw).           A system for producing PostScript drawings
                                  from TeX.
* Web2c: (web2c).               TeX, Metafont, and companion programs.
* afm2tfm: (dvips)Invoking afm2tfm.
                                Making Type 1 fonts available to TeX.
* dvipng: (dvipng).             A DVI-to-PNG translator.
* dvips: (dvips)Invoking Dvips. DVI-to-PostScript translator.
* kpsewhich: (kpathsea)Invoking kpsewhich.
                                TeX file searching.
* mf2pt1: (mf2pt1).             PostScript Type 1 fonts from Metafont source.
* mktexfmt: (kpathsea)mktex scripts.
                                Format (fmt/base/mem) generation.
* mktexlsr: (kpathsea)Filename database.
                                Update ls-R.
* mktexmf: (kpathsea)mktex scripts.
                                MF source generation.
* mktexpk: (kpathsea)mktex scripts.
                                PK bitmap generation.
* mktextex: (kpathsea)mktex scripts.
                                TeX source generation.
* mktextfm: (kpathsea)mktex scripts.
                                TeX font metric generation.

Text creation and manipulation
* Diffutils: (diffutils).       Comparing and merging files.
* M4: (m4).                     A powerful macro processor.
* grep: (grep).                 Print lines matching a pattern.
* sed: (sed).                   Stream EDitor.   command. Use *  SSID  MODE  CHAN  RATE  SIGNAL  BARS  SECURITY  to get current connections

Fix memory leak in telnet module