This also fixes a memory leak from within `_handle_groupchat()` in [0].
[0] src/xmpp/message.c
Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>
When connecting for the first time or when creating a new account don't
use only 'profanity' as default resource.
Some server don't support having 2 connection with same resource. Using
profanity as default lead to deconnections.
