* mandos: Also import "with_statement" and "absolute_import" from "__future__. Import "closing" from "contextlib". (Client.__init__): Use "with closing" on "secfile". (Client.checker_callback): Call "self.bump_timeout()" instead of doing it directly. (Client.bump_timeout): New method to bump up the timeout. (TCP_handler.handle): Simplify code to provide fallback default for GnuTLS priority string. (IPv6_TCPServer): Do not inherit from "SocketServer.ForkingTCPServer", since that is undocumented - instead, follow the example code from the documentation. (if_nametoindex): Use "with closing" on the socket.