MB-11968: Remove unused functionality

Remove the following unused functionality:
 * daemonize
 * lock memory pages into memory
 * Enable large memory pages
 * Support for creating a pid_file

Change-Id: Ic77e24d3719d149bad836ce7dc2ff867dc07f467
Reviewed-on: http://review.couchbase.org/40646
Reviewed-by: Jim Walker <jim@couchbase.com>
Reviewed-by: Dave Rigby <daver@couchbase.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>