#805313 enable DANE s2s authentication for prosody

#805313#5
Date:
2015-11-16 22:09:39 UTC
From:
To:
In order to get mod_s2s_auth_dane [0] luaunbound [1] needs to be
packaged [2].

[0] http://modules.prosody.i/mod_s2s_auth_dane.html
[1] https://www.zash.se/luaunbound.html
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=805311