Don't run regex cleanups before exec (backported from 2.1-dev)

Submitted by:	Jeff Trawick
Reviewed by:	Brian Pane, Bill Rowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@99135 13f79535-47bb-0310-9956-ffa450edef68