* wip based on early draft. todo benchmarking

* fixup eraser, assume keys are unique

* fix cursor copy, test removal at random

* small benchmark via permutations. todo lambdas and novirtual

* fix empty condition / reset

* overwrite optimizations, fix move offsets overflows

* ...erase using 0xff instead of 0

* test the theory with code, different length kv were bugged

* try to check for out-of-bounds writes / reads

* style

* trying to fix mover again

* clarify length, defend against reading len on edge

* fix uncommited rewind change

* prove space assumptions

* more concise traces, fix move condition (agrh!!!)

* slightly more internal knowledge (estimates API?)

* make sure cursor is only valid within the range

* ensure 0 does not blow things

* go back up

* cursor comments

* comments

* rewrite writes through cursor

* in del too

* estimate kv storage requirements, return available size

* move raw erase / move into a method, allow ::set to avoid scanning storage twice

* refactor naming, use in code

* amend storage slicing test

* fix crash handler offsets, cleanup configuration

* start -> begin

* eeprom readiness

* dependencies

* unused

* SPI_FLASH constants for older Core

* vtables -> templates

* less include dependencies

* gcov help, move estimate outside of the class

* writer position can never match, use begin + offset

* tweak save_crash to trigger only once in a serious crash

* doh, header function should be inline

* foreach api, tweak structs for public api

* use test helper class

* when not using foreach, move cursor reset closer to the loop using read_kv

* coverage comments, fix typo in tests decltype

* ensure set() does not break with offset

* make codacy happy again

* wip

* cleanup buttons-through-serial code, remove hw mention from button module

* remove wip

* implement mqtt settings

* fixup struct members, dual no longer allocates debouncer

* add missing debounceevent lib

* fix missing event_handler, update names

* fix namespace

* drop lib

* fix int<->bool comparison

* Move gpio16 handling from DigitalPin to EventHandler

* Cleanup debounceevent headers

* Don't expect system headers to be included

* re 70b54c489f - no allocation, for real

* Adjust settings names

* dont retain by default

* unused

* typo

* Fix length type (ref 6017ad9474)

* Move pin class outside of debounce lib, lowercase ns

* move event handling inside of button_t

* refactor config. ..._MODE -> _CONFIG, ..._MODE_... -> ..._ACTION_...

* fix test

* naming

* move indexed value to header

* refactor actions into direct opts

* fix webui, fix buttons not respecting old user setting

* change button config format from bitmask to a struct, adjust settings conversion

* proxy some more header defautls, fix web kv

* gpiopin

* adjust webui func to support every setting

* clarify single-return event->string

* fix dual setting

* fix dual packet condition, de-duplicate funcs

* fix bogus warning

* Config: remove prototypes.h

* fixup order

* word

* add missing

* fix warning while still using .ino

* bad at c/p;

* debug: log mode, allow to skip boot messages

* typo, fix warning about unhandled switch

* mention telnet wifiserver & reverse changes

* 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

Isolated dependencies

sensors dependencies

enums, macros and prototypes.

I2C dependencies moved to actual sensor files.

definitelly redefine