<IfModule> now takes the module identifier in addition to the
filename.

CAUTION: this commit breaks the build on netware. It still needs
to be adjusted. (but I don't have any netware knowledge...)
Also, developers need to re-run buildconf on unices.

PR: 29003
Submitted by: Edward Rudd <eddie omegaware.com>, Andr� Malo


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@103849 13f79535-47bb-0310-9956-ffa450edef68