Populate metainfo for apps to allow 32 bit node and packet ids

src/mesh/PacketHistory.h

@@ -6,6 +6,9 @@
 
 using namespace std;
 
+/// We clear our old flood record five minute after we see the last of it
+#define FLOOD_EXPIRE_TIME (5 * 60 * 1000L)
+
 /**
  * A record of a recent message broadcast
  */