netlink: Fix comments to variables for netlink sockets and sequence

Commit 3c46901 ("netlink: add subscription on changes in NDP/ARP
table") added the descriptor for the new socket, int nl_sock_neigh,
next to the variables for the existing sockets, without updating the
comment, and before the variable reserved for the sequence number.

That seems to suggest that the sequence number applies to the notifier
socket as well, but that's not the case. Further, the comment didn't
match anymore.

Move the variable declaration for nl_sock_neigh below, and add a
separate comment for it, actually describing it. While at it, fix the
indentation.

Fixes: 3c46901 ("netlink: add subscription on changes in NDP/ARP table")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

Author: sbrivio-rh

netlink.c

@@ -56,10 +56,12 @@
 #define NLBUFSIZ 65536
 
 /* Socket in init, in target namespace, sequence (just needs to be monotonic) */
-int nl_sock		 = -1;
-int nl_sock_ns		 = -1;
-static int nl_sock_neigh = -1;
-static int nl_seq	 = 1;
+int nl_sock			= -1;
+int nl_sock_ns			= -1;
+static int nl_seq		=  1;
+
+/* Socket for neighbour event notifier */
+static int nl_sock_neigh	= -1;
 
 /**
  * nl_sock_init_do() - Set up netlink sockets in init or target namespace