#define MFL_NOALLOC 0x02 // send should NOT allocate a new buffer before returning
#define MFL_ADDSRC 0x04 // source must be added on send
#define MFL_RAW 0x08 // message is 'raw' and not from an RMr based sender (no header)
+#define MFL_HUGE 0x10 // buffer was larger than applications indicated usual max; don't cache
#define MAX_EP_GROUP 32 // max number of endpoints in a group
#define MAX_RTG_MSG_SZ 2048 // max expected message size from route generator