[Telepathy] Code review for wocky/gabble

[Diane Trout]

Hi,

I still feel a bit odd just pushing code to official telepathy
components without anyone else looking at it.

So last chance to review before I push next week.

The small fixes I did.

SSL Certificate Verification Error for weasel-juice-org
https://bugs.freedesktop.org/show_bug.cgi?id=79548

unit test failure: FAIL: wocky http-proxy-test
https://bugs.freedesktop.org/show_bug.cgi?id=94031

soup_session_async_new is now deprecated
https://bugs.freedesktop.org/show_bug.cgi?id=96383


Super useful things done by other people:

XEP-0198 Stream management
https://bugs.freedesktop.org/show_bug.cgi?id=46700
I'm not sure if the final patches are on freedesktop or on github

This currently just implements the minimal message acknowledgement
(I have reviewed it, and written tests for it and other than the
question that its not a complete implementation I think its an
improvement over what we have now and is worth committing.

Though KTP probably needs to be updated for it. He also updated empathy
with some support for showing acknowledgements

XEP-280 message carbons
https://bugs.freedesktop.org/show_bug.cgi?id=78093

I haven't reviewed this yet, but will try soon

Diane