Per discussion on new-httpd, change the logic to do the following:

--enable-modules=most will disable a module if it can not be built
--enable-modules=all  will error if a module can not be built
--enable-modules=foo  will error if the specified module can not be built
                      (even if --enable-modules=most is set)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@90360 13f79535-47bb-0310-9956-ffa450edef68