[Bug 1087228] Re: /etc/network/if-down.d/bind9 doesn't work; should be /etc/network/if-post-down.d/bind9

[Thomas Hood]

All very well to classify this as a "wishlist opinion", but please
accompany that with some sort of reasoning.

Bind9's ifdown hook script does "rndc reconfig" which causes named to
notice changes that have been made. If the script is run *before* taking
down the interface then it is run when no changes have yet been made, so
it has no effect. Immediately after this, ifdown takes down the
interface, but nothing causes named to notice this change. This behavior
was noticed in the real world and can easily be reproduced.

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https://bugs.launchpad.net/bugs/1087228

Title:
  /etc/network/if-down.d/bind9 doesn't work; should be /etc/network/if-
  post-down.d/bind9

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