o Update tcp sendcookie stats. HEAD has a different code and does

not have this bug.

Submitted by:	Igor Sysoev
Reviewed by:	silby

sys/netinet/tcp_syncache.c

@@ -1323,6 +1323,7 @@ syncookie_generate(struct syncache *sc, u_int32_t *flowid)
 	MD5Final((u_char *)&md5_buffer, &syn_ctx);
 	data ^= (md5_buffer[0] & ~SYNCOOKIE_WNDMASK);
 	*flowid = md5_buffer[1];
+	tcpstat.tcps_sc_sendcookie++;
 	return (data);
 }