MB-10020 infrastructure for logging http requests to access.log

Change-Id: I55a0d555686c594ed4e351e07d6983701cb21516
Reviewed-on: http://review.couchbase.org/36608
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>