[NETFILTER]: Change tunables to __read_mostly

Change some netfilter tunables to __read_mostly.  Also fixed some
incorrect file reference comments while I was in there.

(this will be my last __read_mostly patch unless someone points out
something else that needs it)

Signed-off-by: Brian Haley <brian.haley@hp.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 8f22619..3b64dbe 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -77,12 +77,12 @@
 struct nf_conntrack_protocol **nf_ct_protos[PF_MAX];
 struct nf_conntrack_l3proto *nf_ct_l3protos[PF_MAX];
 static LIST_HEAD(helpers);
-unsigned int nf_conntrack_htable_size = 0;
-int nf_conntrack_max;
+unsigned int nf_conntrack_htable_size __read_mostly = 0;
+int nf_conntrack_max __read_mostly;
 struct list_head *nf_conntrack_hash;
 static kmem_cache_t *nf_conntrack_expect_cachep;
 struct nf_conn nf_conntrack_untracked;
-unsigned int nf_ct_log_invalid;
+unsigned int nf_ct_log_invalid __read_mostly;
 static LIST_HEAD(unconfirmed);
 static int nf_conntrack_vmalloc;