Allow biboumi to start without an xmpp server to connect to
What happens
It fails to start because it can't connect to the configured XMPP server.
What I expect
Biboumi starts and wait for the XMPP server to appear. Polling every so often.
I am not sure why this restriction was placed here in the first place, this looks like an administrative burden. Imagine biboumi and the XMPP server being enabled
, if biboumi starts first and fails, as the contrib .service
file can't depend on a server, (which one?), the admin has to manually restart it.