Added new functionality to OTR always policy

If policy is set to always, and unencrypted message is received it will try to start an otr session.

Note: Fully tested with pidgin, is now working (opportunistic and always)
Bugfix: Because whitespace was removed, last check OTR always, didn't work, now it works.
Merge remote-tracking branch 'lucian/master'

Conflicts:
	src/server_events.c