Moved man pages for ab and apachectrl to section 8.

Submitted by:	Wilfredo Sanchez, Roy Fielding
Reviewed by:	Ralf S. Engelschall, Dirk-Willem van Gulik


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82787 13f79535-47bb-0310-9956-ffa450edef68