BGP: Prefix hash is too small, increase its max size.

This doesn't make any change for you until you have
millions of updates waiting to be sent. Increasing
the max hash size from 2^20 to 2^24.

proto/bgp/attrs.c

@@ -1302,7 +1302,7 @@ bgp_withdraw_bucket(struct bgp_channel *c, struct bgp_bucket *b)
 #define PXH_FN(n,i,h)		h
 
 #define PXH_REHASH		bgp_pxh_rehash
-#define PXH_PARAMS		/8, *2, 2, 2, 8, 20
+#define PXH_PARAMS		/8, *2, 2, 2, 8, 24
 
 
 HASH_DEFINE_REHASH_FN(PXH, struct bgp_prefix)