phranque - 6:48 am on Sep 2, 2013 (gmt 0)
also note this since you will probably want to drop the query string from the redirected url.
Modifying the Query String
By default, the query string is passed through unchanged. You can, however, create URLs in the substitution string containing a query string part. Simply use a question mark inside the substitution string to indicate that the following text should be re-injected into the query string. When you want to erase an existing query string, end the substitution string with just a question mark. To combine new and old query strings, use the [QSA] flag.