Make activity no longer a function of ping frequency, since this causes compatibility bugs when the latter was modified due to timer interactions with other versions.

node/Constants.hpp

@@ -260,7 +260,12 @@
 /**
  * Timeout for overall peer activity (measured from last receive)
  */
-#define ZT_PEER_ACTIVITY_TIMEOUT ((ZT_PEER_DIRECT_PING_DELAY * 4) + ZT_PING_CHECK_INVERVAL)
+#define ZT_PEER_ACTIVITY_TIMEOUT 500000
+
+/**
+ * Timeout for path activity
+ */
+#define ZT_PATH_ACTIVITY_TIMEOUT ZT_PEER_ACTIVITY_TIMEOUT
 
 /**
  * No answer timeout to trigger dead path detection

node/Path.hpp

@@ -127,7 +127,7 @@ public:
 	inline bool active(uint64_t now) const
 		throw()
 	{
-		return (((now - _lastReceived) < ZT_PEER_ACTIVITY_TIMEOUT)&&(_probation < ZT_PEER_DEAD_PATH_DETECTION_MAX_PROBATION));
+		return (((now - _lastReceived) < ZT_PATH_ACTIVITY_TIMEOUT)&&(_probation < ZT_PEER_DEAD_PATH_DETECTION_MAX_PROBATION));
 	}
 
 	/**