[NETFILTER]: Rename init functions.

Every netfilter module uses `init' for its module_init() function and
`fini' or `cleanup' for its module_exit() function.

Problem is, this creates uninformative initcall_debug output and makes
ctags rather useless.

So go through and rename them all to $(filename)_init and
$(filename)_fini.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c
index 9d3b357..4269a54 100644
--- a/net/ipv4/netfilter/ipt_REJECT.c
+++ b/net/ipv4/netfilter/ipt_REJECT.c
@@ -313,15 +313,15 @@
 	.me		= THIS_MODULE,
 };
 
-static int __init init(void)
+static int __init ipt_reject_init(void)
 {
 	return ipt_register_target(&ipt_reject_reg);
 }
 
-static void __exit fini(void)
+static void __exit ipt_reject_fini(void)
 {
 	ipt_unregister_target(&ipt_reject_reg);
 }
 
-module_init(init);
-module_exit(fini);
+module_init(ipt_reject_init);
+module_exit(ipt_reject_fini);