Implement Ad-hoc (XEP-50)

[Kaffeine]

It seems that QXmpp doesn't support XEP-50, but probably we can implement it based on

https://github.com/0xd34df00d/leechcraft/tree/master/src/plugins/azoth/plugins/xoox

[detrout]

FWIW I made an attempt at XEP 50 support in telepathy-gabble using just the iq message support of the console plugin. The most annoying part is needing to implement data forms to do anything useful.

[Kaffeine]

@detrout
Thank you for the attention! :)
Frankly speaking I added this issue after reading of your conversation in IRC. I thought that this XEP is already implemented in our QXmpp backend, but it turned out that the implementation is not upstreamed.