Sets msg's status_code to status_code and adds a Location header
pointing to redirect_uri. Use this from a classServer when you
want to redirect the client to another URI.
redirect_uri can be a relative URI, in which case it is
interpreted relative to msg's current URI. In particular, if
redirect_uri is just a path, it will replace the path
*and query* of msg's URI.
Sets msg's status_code to status_code and adds a Location header pointing to redirect_uri. Use this from a classServer when you want to redirect the client to another URI.
redirect_uri can be a relative URI, in which case it is interpreted relative to msg's current URI. In particular, if redirect_uri is just a path, it will replace the path *and query* of msg's URI.