Preparation for Release 4.1.0

[slaff]

This issue is created to collect all the tasks we need to do before the 4.1.0 release.

Source Code

• Update Sming/Core/SmingVersion.h Preparation for Sming v4.1.0. #2035
• Update Readme.md Preparation for Sming v4.1.0. #2035
• Merge develop into master
• Tag the source code in the master branch

New features

• No-WiFi build option No-WiFi build option #2004 - get more resources if your application is not using WIFI.
• Multiple SSL adapters based on axTLS and BearSSL. Feature: ssl abstraction #1999
• Added basic Crypto support library Revise fingerprint handling and add basic Crypto support library #2014
• Updates framework to build using GCC 9.2.0 toolchain for C++17. Update toolchains to C++17 #1825
• Modbus master Feature: modbus master #1992
• Implemented Small String Optimisation (SSO). Implement Small String Optimisation (SSO) #1951
• Webcam stream and sample webcam web server. Webcam stream and sample webcam web server. #1981
• Allow HTTP connections to ignore rejected body content Allow HTTP connections to ignore rejected body content (#1875) #1928

Improvements

• Some improvements to multipart parser Some improvements to multipart parser #2007
• Update ArduinoJson to 6.13.0 Update ArduinoJson to 6.13.0 #1979
• Added precaching from Arduino for ESP8266. Adding precaching from Arduino for ESP8266. #1965
• Add support for 'Expect: 100-continue' in HTTP server. Add support for 'Expect: 100-continue' in HTTP server. #1931
• Upgrade to FlashString Library Upgrade to FlashString Library v2.0.0 #1974, Fix and improve FlashString load/import #2013

Bug fixes

• Updated mqtt-codec to allow publish messages without payload. Update mqtt-codec to allow publish messages without payload. #1976
• HttpConnection freed twice. bugfix: HttpConnection freed twice #1938
• Hangs at startup when custom heap enabled. bugfix: Hangs at startup when custom heap enabled #1996
• Fix issues reported by valgrind Fix issues reported by valgrind #2017

Breaking changes and Migration

• See our dedicated page for migration from 4.0.0 to 4.1.0.

All PRs scheduled for this release can be seen from here

[mikee47]

With a stable release I've added a couple of extra versions at https://sming.readthedocs.io/

• latest (develop)
• stable (4.0.0)
• 4.0.0

Just a suggestion, easily changed.