* <pre>
* - HTTP_URL_REPLACE: (default) set parts of the second url will replace the parts in the first
* - HTTP_URL_JOIN_PATH: the path of the second url will be merged into the one of the first
- * - HTTP_URL_JOIN_QUERY: the two querystrings will be merged naivly; no replacements are done
+ * - HTTP_URL_JOIN_QUERY: the two querystrings will be merged recursively
* - HTTP_URL_STRIP_USER: the user part will not appear in the result
* - HTTP_URL_STRIP_PASS: the password part will not appear in the result
* - HTTP_URL_STRIP_AUTH: neither the user nor the password part will appear in the result