use different constants for now in meshnet mode

NetDb.h

@@ -27,11 +27,18 @@ namespace i2p
 namespace data
 {		
 	const int NETDB_MIN_ROUTERS = 90;
+#ifdef MESHNET
+	const int NETDB_FLOODFILL_EXPIRATION_TIMEOUT = 60; // 1 hour, in seconds
+	const int NETDB_INTRODUCEE_EXPIRATION_TIMEOUT = 65;
+	const int NETDB_MIN_EXPIRATION_TIMEOUT = 90; // 1.5 hours
+	const int NETDB_MAX_EXPIRATION_TIMEOUT = 27*60; // 27 hours
+#else
 	const int NETDB_FLOODFILL_EXPIRATION_TIMEOUT = 60*60; // 1 hour, in seconds
 	const int NETDB_INTRODUCEE_EXPIRATION_TIMEOUT = 65*60;
 	const int NETDB_MIN_EXPIRATION_TIMEOUT = 90*60; // 1.5 hours
 	const int NETDB_MAX_EXPIRATION_TIMEOUT = 27*60*60; // 27 hours
-	
+#endif
+  
 	class NetDb
 	{
 		public: