TOKEN_GROUP is nothing but an identity operator, it gateways the

TOKEN_GROUP is nothing but an identity operator, it gateways the
result of the enclosed expression. Since this expression will never
touched again during the tree-building stage, we can safely strip
TOKEN_GROUP from the tree and later evaluate the child directly.

The only side effect of this change is, that grouped strings on the
left side of EQ/NE/etc are now allowed (was invalid before), which
is acceptable IMHO (e.g. (foo bar baz) = zzzip)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101114 13f79535-47bb-0310-9956-ffa450edef68