Tighten up credential push just a bit for faster up-time with older nodes, should not have significant impact on bandwidth. Also some cleanup and push direct path timing fixes.

node/Membership.hpp

@@ -78,6 +78,14 @@ public:
 	 */
 	void pushCredentials(const RuntimeEnvironment *RR,void *tPtr,const int64_t now,const Address &peerAddress,const NetworkConfig &nconf,int localCapabilityIndex);
 
+	/**
+	 * @return True if we haven't pushed credentials in a long time (to cause proactive credential push)
+	 */
+	inline bool shouldPushCredentials(const int64_t now) const
+	{
+		return ((now - _lastPushedCredentials) > ZT_PEER_ACTIVITY_TIMEOUT);
+	}
+
 	/**
 	 * Check whether we should push MULTICAST_LIKEs to this peer, and update last sent time if true
 	 *
@@ -213,6 +221,9 @@ private:
 	// Revocation threshold for COM or 0 if none
 	int64_t _comRevocationThreshold;
 
+	// Time we last pushed credentials
+	int64_t _lastPushedCredentials;
+
 	// Remote member's latest network COM
 	CertificateOfMembership _com;