[DCCP]: Generalize dccp_v4_send_reset

Renaming it to dccp_send_reset and moving it from the ipv4 specific
code to the core dccp code.

This fixes some bugs in IPV6 where timers would send v4 resets, etc.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 67691a05..eac5178 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -32,7 +32,7 @@
 
 static void dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
 {
-	dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED);
+	dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED);
 	dccp_fin(sk, skb);
 	dccp_set_state(sk, DCCP_CLOSED);
 	sk_wake_async(sk, 1, POLL_HUP);