Openssl 1.1.1 is end-of-life in September 2023.
This PR removes support for versions of openssl OLDER than 1.1.1
1.1.1 should still be usable after this change is merged.
I don't see any value in supporting 1.1.1, but didn't see a reason to
purge support for 1.1.1 when there are so few checks for >= 3.0.
Note that this does also remove CI support for Ubuntu 16.04. The
official version of OpenSSL from Ubuntu for this release is listed here:
https://launchpad.net/ubuntu/+source/openssl as 1.0.2g
Since no newer releases of coturn will be backported by Canonical to
Ubuntu 16.04, anyone using Coturn on this operating system will have to
download and compile it themselves. They may build their own version of
OpenSSL if they somehow cannot upgrade to a newer version of Ubuntu.
My position is that these users should prefer to upgrade to a newer
operating system than worry about chasing newer releases of Coturn.
Co-authored-by: Pavel Punsky <eakraly@users.noreply.github.com>
