Fixed group peer chosing algorithm.

Groups should be much more stable.
Reduced the risk of two people being given the same peer id in groups.
Merge branch 'master' into debian/unstable
prepare for release

Signed-off-by: Kill Your TV <killyourtv@i2pmail.org>
Send friend request with connection if for some reason (groupchats) we
are already connected to the friend but they have not added us yet.
Merge branch 'master' into debian/unstable
prepare for release

Signed-off-by: Kill Your TV <killyourtv@i2pmail.org>