From: Nicolas Dichtel <nicolas.dichtel@dev.6wind.com>
Date: Mon, 01 Jun 2009 17:13:43 +0200

quoted text
> RFC indicates that a router must drop the packet if this field is 0.

It only must do this when executing the forwarding function.  It's an
egress check, not an ingress one.

I'm not applying this patch, it can even break some applications
out there that use a TTL of zero intentionally to keep traffic
only on a local subnet.
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