Fix a long-standing bug in 2.0, CGI scripts were being called

with relative paths instead of absolute paths.  Apache 1.3 used
absolute paths for everything except for SuExec, this brings back
that standard.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95899 13f79535-47bb-0310-9956-ffa450edef68