I have submitted the 'tls_version' to the incorrect default branch.
The correct submit was done in changeset 15331:b5831b64e5d2 ,
branch gajim_0.16 .

add configuration option tls_version

Related to
https://python-nbxmpp.gajim.org/ticket/17

https://trac.gajim.org/ticket/7599

Use send_message instead of pushing an event and print at own when sending remotely (when possibe). Fixes #7457

add twiter icon to disco, better irc detection, use address when identidy doesn't help enough. Fixes #7396