minor fixes by kisza:
- remove -C(check) function from ip6tables
- -M added to the getopts()'s list (missed)
- small change in the iptables help
- remove some unused code
- some GPL notice added
diff --git a/iptables.c b/iptables.c
index 1f88902..cd3c1fe 100644
--- a/iptables.c
+++ b/iptables.c
@@ -342,7 +342,7 @@
 	struct iptables_target *t = NULL;
 
 	printf("%s v%s\n\n"
-"Usage: %s -[ADC] chain rule-specification [options]\n"
+"Usage: %s -[AD] chain rule-specification [options]\n"
 "       %s -[RI] chain rulenum rule-specification [options]\n"
 "       %s -D chain rulenum [options]\n"
 "       %s -[LFZ] [chain] [options]\n"