Major work on distrib/forums system.

- Now creates Distribution Groups, with Admin + Publish Keys.
 - Distributes Groups + Public Keys in the Cache File.
 - Stores private Keys and subscribed groups in Configuration.
 - Forum Test to check basic functionality.
 - Added nullService for services that require tick(), but no instant messages.
 - removed debugging for other services (ranking/gamelauncher) 



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@593 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/services/p3service.h

@@ -95,6 +95,35 @@ void 	addSerialType(RsSerialType *);
 };
 
 
+class nullService: public pqiService
+{
+	protected:
+
+	nullService(uint16_t type) 
+	:pqiService((((uint32_t) RS_PKT_VERSION_SERVICE) << 24) + (((uint32_t) type) << 8))
+	{
+		return; 
+	}
+
+//virtual int	tick() 
+
+	public:
+	// overloaded NULL pqiService interface.
+virtual int		receive(RsRawItem *item)
+	{
+		/* drop any items */
+		delete item;
+		return 1;
+	}
+
+virtual RsRawItem *	send()
+	{
+		return NULL;
+	}
+
+};
+
+
 #if 0
 
 class p3ThreadedService: public p3Service, public RsThread