FIX: regex-matching was broken if (!family_url)
FIX: regex-matching was broken if (!family_url)

When creating endpoints like
    ws.register_resource("/hello/{test|[0-9]+}", &hwr, false);
the match never succeeded, because the regex was matched against the modded request URL which contained '^' and '$'.
etr/libhttpserver,4picht/libhttpserver,etr/libhttpserver,4picht/libhttpserver,4picht/libhttpserver,etr/libhttpserver,4picht/libhttpserver