bc_http: If 'always on', always reconnect

Change-Id: I28b6ca686f20e56a62ad4b1a2106d29dbbdb5cd6
Reviewed-on: http://review.couchbase.org/34956
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>