fixing github url.

Remove missing column so github can beautify the contents

Fixes: https://github.com/espressif/arduino-esp32/issues/309

Fixes: https://github.com/espressif/arduino-esp32/issues/304

Thanks @jliegner :)

thans @martinayotte

* Support self signed certificates

Fix for https://github.com/espressif/arduino-esp32/issues/265

mbedtls_ssl_conf_authmode was defined before mbedtls_ssl_config_defaults causing several bugs when no CA certificate is defined.

* Implement Arduino's log facility

Replace printf by ESP log handling

* Remove \n from debug messages

log_ doesn't need \n to break line.

Should Fix: https://github.com/espressif/arduino-esp32/issues/234

Thanks @marcmerlin and @MartyMacGyver

Fixes: https://github.com/espressif/arduino-esp32/issues/275

Fixes: https://github.com/espressif/arduino-esp32/issues/263

Fixes: https://github.com/espressif/arduino-esp32/issues/270

Actually WiFiMulti is not working due some functions haven't equal comportment of ESP8266
Replace status == WL_DISCONNECTED => status != WL_CONNECTED
Replace scanComplete() => scanNetworks()

Maybe is more interesting, for keep the maximum compatibility, investigate why WL_DISCONNECTED and scanComplete() doesn't works in this case instead of just replace by this pull request.

Closes: https://github.com/espressif/arduino-esp32/pull/267

The card seems to need a bit of a nudge at boot to properly mount
sometimes.
Fixes: https://github.com/espressif/arduino-esp32/issues/272

Some boards have different default pins for SPI

Thanks @Ladyada

It's look more a practical guide "how to use SD lib"

* Add Sketch Update Library

* Add MDNS Library

* Add Arduino OTA Library

* add missing library file

* Add library files for Update

* Add missing headers

* fix ota command

* Add espota binary

* remove bad example

* PlatformIO does not auto forward declare methods like Arduino Builder

* Add CA certificate in example

SHA1 fingerprint is broken now: more info: https://shattered.io

* Best error handling

When occur an error in WiFiClientSecure library just return the error message
and clean the context avoiding crash - fix for https://github.com/espressif/arduino-esp32/issues/211

Translate MbedTLS error codes in messages for best understanding

* Declarate certificates as const

mbedtls_pk_parse_key needs a const unsigned char * certificate. In old implementation the certificate was declarated as char * so first it converts to unsigned and after to const.

When we convert signed to unsigned it may result in a +1 larger output.

Fix issue https://github.com/espressif/arduino-esp32/issues/223

* add DFRobot FireBeetle-ESP32 support

* add variant for fireBeetle-ESP32

* The name of the env variant is changed to firebeetle32