[sr-dev] Heads-up: master/libssl - going to revert tls_threads_mode=1

HI devs, In trying to solve the libssl3 issue the original attempt with tls_threads_mode=1 turns out to be not quite correct. Since the release of 5.8 we have consistently recommended tls_threads_mode=2 for users of libssl 1.1.1 and 3. For master/6.0.0-pre I will start to revert the changes of tls_threads_mode=1. I will also add a new simpler mode tls_threads_mode=3 based on the diff by Ondrej Jirman <megi(a)xff.cz> (@meengu). Regards Richard