[NETFILTER]: Update modules' descriptions

Updates the MODULE_DESCRIPTION() tags for all Netfilter modules,
actually describing what the module does and not just
"netfilter XYZ target".

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/ipt_recent.c b/net/ipv4/netfilter/ipt_recent.c
index 4f3700d..e3154a9 100644
--- a/net/ipv4/netfilter/ipt_recent.c
+++ b/net/ipv4/netfilter/ipt_recent.c
@@ -30,7 +30,7 @@
 #include <linux/netfilter_ipv4/ipt_recent.h>
 
 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
-MODULE_DESCRIPTION("IP tables recently seen matching module");
+MODULE_DESCRIPTION("Xtables: \"recently-seen\" host matching for IPv4");
 MODULE_LICENSE("GPL");
 
 static unsigned int ip_list_tot = 100;