Prettify lcb_cntl tables

Change-Id: Id57284f93c66535f39c3aaaca4ec19d93ba7529f
Reviewed-on: http://review.couchbase.org/43198
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>