Allow the builder to specify a default umask for scripts
	wrapped by suexec.

PR:		4178
Reviewed by:	Ryan Bloom, Martin Kraemer, Jim Jagielski, Greg Stein


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@84432 13f79535-47bb-0310-9956-ffa450edef68