2.1.0

Support TLS via new Application layered TCP Introduction connection API (https, smtps, mqtt over TLS)
Switch to cmake as the main build system (Makefile file lists are still maintained for now)
Improve IPv6 support: support address scopes, support stateless DHCPv6, bugfixes
Add debug helper asserts to ensure threading/locking requirements are met
Add sys_mbox_trypost_fromisr() and tcpip_callbackmsg_trycallback_fromisr() (for FreeRTOS, mainly)
socket API: support poll(), sendmsg() and recvmsg(); fix problems on close

Detailed Changelog