Promote per_dir_config and subprocess_env from subrequest to main request.

Fixes a problem where <Files> sections weren't properly applied to negotiated
content.

Reviewed by:	Roy, Randy


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77922 13f79535-47bb-0310-9956-ffa450edef68