IRCNetwork.h: lower ping frequency & timeout

Ref: #979

include/znc/IRCNetwork.h

@@ -50,13 +50,13 @@ public:
 	enum {
 		JOIN_FREQUENCY = 30,
 		/** How long must an IRC connection be idle before ZNC sends a ping */
-		PING_FREQUENCY = 270,
+		PING_FREQUENCY = 120,
 		/** Time between checks if PINGs need to be sent */
 		PING_SLACK = 30,
 		/** Timeout after which IRC connections are closed. Must
 		 *  obviously be greater than PING_FREQUENCY + PING_SLACK.
 		 */
-		NO_TRAFFIC_TIMEOUT = 540
+		NO_TRAFFIC_TIMEOUT = 180
 	};
 
 	void Clone(const CIRCNetwork& Network, bool bCloneName = true);