Thanks Ryan for cleaning up after my laziness. :) Here are just a few

Thanks Ryan for cleaning up after my laziness.  :)  Here are just a few
last little changes.  ->datafile should be initialized... but doing so
brings up the fact that the check in run_rewritemap_programs() was
expecting ->datafile to have a string attached to it.  For clarity,
let's just use argv[0] there.  And since we've reinstated the use of
->checkfile, we no longer need that extra apr_stat() I hacked in,
so let's get rid of it.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95375 13f79535-47bb-0310-9956-ffa450edef68