ap_sub_req_lookup_file() was assuming that all absolute paths
	begin with "/" -- which obviously isn't the case for Win32.
	#ifdef this to do the right thing on Win32.  (It's unclear
	whether a leading "/" should still be considered a valid absolute
	path for Win32, since it's thereby inheriting the current
	drive.  At least most of the hole is closed.)

PR:		2976, 3074
Submitted by:	Ken Parzygnat <kparz@raleigh.ibm.com>
Reviewed by:	Ken Coar


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82187 13f79535-47bb-0310-9956-ffa450edef68