Add code for the installer DLL. This is the file that replaces

the @@ServerRoot@@ sequences in the configuration files with
the real install directory.

Also here is a test program, in test/, which calls the installer DLL
and can be used to debug it.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80314 13f79535-47bb-0310-9956-ffa450edef68