[DCCP] ipv6: Add missing ipv6 control socket

I guess I forgot to add it, nah, now it just works:

18:04:33.274066 IP6 ::1.1476 > ::1.5001: request (service=0)
18:04:33.334482 IP6 ::1.5001 > ::1.1476: reset (code=bad_service_code)

Ditched IP_DCCP_UNLOAD_HACK, as now we would have to do it for both
IPv6 and IPv4, so I'll come up with another way for freeing the
control sockets in upcoming changesets.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 6fcc9d4..d57d2135 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -177,7 +177,7 @@
 extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
 				const struct dccp_hdr *dh, const unsigned len);
 
-extern int dccp_init_sock(struct sock *sk);
+extern int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized);
 extern int dccp_destroy_sock(struct sock *sk);
 
 extern void		dccp_close(struct sock *sk, long timeout);
@@ -337,8 +337,6 @@
 			       unsigned char option,
 			       const void *value, unsigned char len);
 
-extern struct socket *dccp_ctl_socket;
-
 extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
 
 static inline suseconds_t timeval_usecs(const struct timeval *tv)