Handle PATH_INFO as opaque byte-wise data for cgi invocation as
  handled for other variables with bug 9223.

PR: 32730
Submitted by: Richard Donkin <rd9 donkin.org>

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@124556 13f79535-47bb-0310-9956-ffa450edef68