[DCCP]: Introduce a consistent naming scheme for sysctls

In order to make their function clearer and obtain a consistent naming
scheme to identify sysctls, all existing DCCP sysctls have been prefixed
with `sysctl_dccp', following the same convention as used by TCP.

Feature-specific sysctls retain the `feat' in the middle, although the
`default' has been dropped, since it is obvious from use.

Also removed a duplicate `dccp_feat_default_sequence_window' in ipv4.c.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 5b2773e..0c49733 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -300,7 +300,7 @@
 {
 	inet_rsk(req)->rmt_port = dccp_hdr(skb)->dccph_sport;
 	inet_rsk(req)->acked	= 0;
-	req->rcv_wnd		= dccp_feat_default_sequence_window;
+	req->rcv_wnd		= sysctl_dccp_feat_sequence_window;
 }
 
 EXPORT_SYMBOL_GPL(dccp_reqsk_init);