Doh. If Accept-Encoding contains no gzip token, we skip the 0 delimiter

and search for "gzip" somehwere in the memory. This was originally discovered
by Joe Orton. But there's more. We must skip any parameters, since these
do not contain what we're looking for.

PR: 21523


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101015 13f79535-47bb-0310-9956-ffa450edef68