Various tweaks to eliminate pointer-int casting warnings on 64-bit cpus

like the alpha.  Apache still stores ints in pointers, but that's the
relatively safe direction.

Reviewed by:	Brian Behlendorf, Jim Jagielski
PR:		344


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78765 13f79535-47bb-0310-9956-ffa450edef68