cbc: Allow to force SASL authentication mechanism

Change-Id: Icf06230f900ed9246e2905eedd60a708580d2ce8
Reviewed-on: http://review.couchbase.org/30251
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
sync with ep-engine/command_ids.h

Change-Id: Ic244016a84557aa11115ef44b6e37a5ad344c24e
Reviewed-on: http://review.couchbase.org/30781
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
Extract function to dump config cache to disk

Change-Id: Ie33bbd8dda5c85c401ca4883630a54d0aff9de82
Reviewed-on: http://review.couchbase.org/30316
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>