if-pre-up.d and if-post-down.d scripts broken for many packages

[Mark Hedges <hedges scriptdolphin com>]

Hi.  I think there's a strong case for bringing back
if-pre-up.d and if-post-down.d scripts:

A) it's how ifupdown works, and network-manager is supposed
to use ifupdown.

B) it's essential for security to restrict firewall access
for address association and before scripts in if-up.d, and
between the time that if-down.d scripts run and when the
interface is brought down.

C) lots of packages in debian install scripts in if-pre-up.d
and if-post-down.d that they expect to run.

I filed a bug which references the bugs in debian and
ubuntu: https://bugzilla.gnome.org/show_bug.cgi?id=600167

Hoping to spur some movement on this.  I have some firewall
scripts I want to package up which depend on this.

It doesn't seem like it would be hard, but I mainly do perl
and I'ma little lost in the source.  If someone can point me
to the right place I'll prepare a patch.

Thanks.

Mark