Misc. tweaks made while porting Chatty to use MYNetwork.
* Allow -[BLIPConnection sendRequest:] to re-send an already-sent or received request.
* Allow use of the basic -init method for BLIPConnection.
* Some new convenience factory methods.
* Broke dependencies on Security.framework out into new TCPEndpoint+Certs.m source file, so client apps aren't forced to link against Security.

 /*

  *  MYNetwork.h

  *  MYNetwork

  *

  *  Created by Jens Alfke on 4/21/09.

  *  Copyright 2009 Jens Alfke. All rights reserved.

  *

  */

 #import "BLIP.h"

 #import "MYBonjourBrowser.h"

 #import "MYBonjourService.h"

 #import "IPAddress.h"

 #import "MYPortMapper.h"