* gpio: detect esp8285 chip to allow the use of GPIO9 and GPIO10

* add another reference to the current rtos headers (but not used anywhere in the sdk code)

* fix typo in register order

* fixup! fix typo in register order

* Added T6613

* Added T6613

* Added T6613

* Added T6613

* Added T6613

* Added T6613

* Added T6613

* Added T6613

* Added T6613

* Updated copyright string

* Buffer from 6 bytes to 8 bytes

Current gcc-4 does not mark this as warning, but gcc-9 notices the 3 char size requirement. Buffer should be 8

* Use 5000ppm max

* Added restore last schedule support

* Merged RestoreLastScheduleState function into the _schCheck function

* handle lights in restore action

* hide webui chbox when not using scheduler

* use settings instead of struct member, hide under ifdef scheduler_support

* relayLastSchedule uses SCHEDULER_RESTORE_LAST_SCHEDULE as default

* Changed all the variable names to be the same so there would be no confusions

* Fixed client side to create an array from relayLastschedule

* Fixed cosmetic issue with the toggle display in webui

* Fixed variable name and disabled comparison at the end

* Added another check if the switch type is light provider

* Changed variables naming

* Naming mistake

- stack-like discovery struct to store pending mqtt topic and
message
- use separate json objects for sensor and switch data (different solution for the #1957)

* MQTT Fingerprint setting capitalization fix

* otafp -> otaFP

* test: restore webui builds in travis

* show build.sh usage via -h, exclude build stage instead of explicitly including it

* utils/version: use git description token as version, add memoization

* pio: move extra scripts to a separate directory

* pio: add -DAPP_REVISION=... as local build flag

* terminal: avoid softlock when comparing signed with unsigned

* move offset increment to condition

* adjust settings and crash handler available space

* key

* offset embedis writer and reader too

* rollback settings change

* travis: move build flags tests outside of hardware header

* mqtt: fix typo

* travis: use files instead of bundling test cases into script

* fixup! travis: use files instead of bundling test cases into script

* fix variable expansion, remove custom h at the end

* add ade7953 to sensors list

* custom.h path as variable

* shellcheck

* fix printf syntax, silent again

* fix bash 4.3 treating empty array as unset variable

* telnet: buffered output for async server

* telnet: make async buffer an option

* just use the queue containers directly

* try with simpler list

* exhaust buffers as much as possible in a single try

* don't forget to destroy the client object

* naming

* kill the connection earlier

* fix merge issues

* Added support for reverse telnet

* Fix issues with first command being ignored

* Fix incorrect client creation

* Integrate PR 1927

...2.6.0+ does this all by itself

hide _mqtt_client_secure under preprocessor check

Control board for Hoermann UAP1 Garage interface
http://frank-schuetz.de/index.php/fhem/13-hoermann-torantrieb-mit-espeasy-in-fhem-einbinden

* Get rid of _telnetFirst (assumption that first line is always telnet renegotiation)

Discussed in: #1920 (comment)

* light: fix inconsistent transitions

- capture step variable for the current transition
- use one-shot timer, restart from the timer callback

* schedule inside provider func, not transition

* web: re-add wifi scan action, send as json array

* ws: forcibly inline send functions