[Azoth Murm] Poll iff server is not empty.
[Azoth Murm] Clear LP server on status change.
[Azoth Murm] Re-fetch poll server if not offline.
[Azoth Murm] Fetch friends only after groups are received.

Fixes #1232.
Merge branch 'master' of github.com:0xd34df00d/leechcraft