In src/Configure remove the SERVER_SUBVERSION support (already deprecated

since 1.3b7) and make whitespace handling more robust (it failed horrible
when whitespaces were present in the arguments of -D options).

PR: 3240


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82451 13f79535-47bb-0310-9956-ffa450edef68