merge this fix into stable branch:

*) mod_cgi, mod_cgid, mod_ext_filter: Log errors when scripts cannot
   be started on Unix because of such problems as bad permissions,
   bad shebang line, etc.  [Jeff Trawick]

Reviewed by:	nd, stoddard


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@98821 13f79535-47bb-0310-9956-ffa450edef68