* mbedtls 2.7.0 (mbedtls-2.7.0-0-g32605dc8)
Wholesale import, with a few changes from earlier preserved through.
Ideally we would soon get to the point of having no divergences from
upstream.
* tls: add function to adjust mbedTLS debug level
* Fix some subtle timing issues with gpio.pulse
* Add the pulse:update method
* Allow getstate to work on stopped pulsers
* Make gpio.mode(, gpio.OUTPUT) actually set the output mode
* Added some more documentation
* ws2812 effects and color utils modules added
* Added documentation for new modules to mkdocs.yml
* changed mode option to string, documentation, default modules fixed
* updated user_modules.h
* add final sqlite3 patch
* remove unused defines, join caching code with esp vfs code to reduce exported symbols and shrink final file size
* Modules should by default be disabled and in alphabetical order
* mbedTLS update
* mbedtls: vsnprintf macroification
* Further update mbedTLS to 2.6.1
* mbedtls: make debugging work again
* Silence SSL messages on normal teardown
* Drop DTLS support from mbedtls
* Make the rtc variables not be cleared by the .bss initialization
* Move the save to the right place
* Make sure that we reset the rtctime to 0 if we didn't sleep properly.
* Setting the seconds to zero doesn't update the dsleep calibration
* Improve RTC timekeeping -- includes clock rate tracking
* Improved division by 1M
* Fix crash in sntp
* Disable RTC debug
* Get the offset correct
* Add comments on where the mysterious numbers came from
* Fix a crash with auto repeat mode and errors on repeat
The following functions were removed:
- `wifi.sta.eventMonReg()`
- `wifi.sta.eventMonStart()`
- `wifi.sta.eventMonStop()`
The corresponding documentation has also been removed
This PR addresses issue #1893
* Rewrite net.dns.resolve on LWIP
* Move IGMP (net multicast) to LWIP
* Cleanup net module
* Move secure connection operations to tls module
* Net module on LWIP
* Server timeout parameter
* TCP hold
* Fixes in documentation
* Documentation fixes
* Note TLS module depends on net
* Add TLS module to user_modules.h
* Callback on connect event
* Fix depends net module on tls module
* Fix unhold exponential time issue
* Switch off interrupts before rtctime dsleep.
* Deal with the fact that MCU keeps running after being told to enter deep sleep
(It can keep running for quite a few instructions at times (and none at
all at others), and it appears that trying to cache additional code from
SPI flash while trying to go to sleep fails miserably at both....)
* Ensure flash is not active when going into deep sleep.
* Update LWIP from SDK
* mbedTLS integration
* Fix argument type in dbg_printf (#1624)
* Migrate to espressif’s download center (#1604)
* Fixed BBS links to firmware
* Adjust net module docs with mbedTLS info
* Remove unrelevant axTLS notice