[ICSK]: Introduce reqsk_queue_prune from code in tcp_synack_timer

With this we're very close to getting all of the current TCP
refactorings in my dccp-2.6 tree merged, next changeset will export
some functions needed by the current DCCP code and then dccp-2.6.git
will be born!

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 68f1ec1..2423f05 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -423,7 +423,8 @@
 					    size_t len, int nonblock, 
 					    int flags, int *addr_len);
 
-extern int			tcp_listen_start(struct sock *sk);
+extern int			inet_csk_listen_start(struct sock *sk,
+						      const int nr_table_entries);
 
 extern void			tcp_parse_options(struct sk_buff *skb,
 						  struct tcp_options_received *opt_rx,