Fix rTorrent connectivity

The combination of cleanHost and rTorrent.connect issues caused rTorrent
connections to fail. This update fixes cleanHost() so that it can
actually cope with SSL based hosts and finishes the migration to
cleanHost() in connect()

Conflicts:
	couchpotato/core/helpers/variable.py
Merge pull request #2775 from ressu/fix_rtorrent_connection

Fix rTorrent connectivity