Add comments on endif & endmenu blocks. This can save time
when searching & trying to understand kconfig menu dependencies.

The other endif & endmenu statements are already commented like this.

This makes it similar to drivers/net/Kconfig, which is already
commented like this.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
---
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Simon Horman <horms@kernel.org>

 net/Kconfig |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- linux-next.orig/net/Kconfig
+++ linux-next/net/Kconfig
@@ -247,7 +247,7 @@ source "net/ipv4/netfilter/Kconfig"
 source "net/ipv6/netfilter/Kconfig"
 source "net/bridge/netfilter/Kconfig"
 
-endif
+endif # if NETFILTER
 
 source "net/sctp/Kconfig"
 source "net/rds/Kconfig"
@@ -408,9 +408,9 @@ config NET_DROP_MONITOR
 	  just checking the various proc files and other utilities for
 	  drop statistics, say N here.
 
-endmenu
+endmenu # Network testing
 
-endmenu
+endmenu # Networking options
 
 source "net/ax25/Kconfig"
 source "net/can/Kconfig"