Fix some mod_include bugs which broke the evaluation of some expressions.

There are a few instances of the same basic problem which are not yet
fixed and which I have marked with /* XXX.*FUBAR*/.

PR:      10108


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93916 13f79535-47bb-0310-9956-ffa450edef68