NTP servers list isn't updated in Debian

[Mike <debian good-with-numbers com>]

Lubomir Rintel wrote:
> NetworkManager does not do anything with NTP.
>
> It's probably the DHCP client shipped with your distribution that
> invokes ntpdate upon getting the DHCP reply. Look for "script" clause in
> you dhclient.conf or into dhclient.d, if present.

True.  Except the issue is that, in Debian, nothing is getting called to set
up NTP for the NM change.  This is http://bugs.debian.org/537358

http://www.guiguishow.info/categorie/administration-reseau/page/4/ and its
links also describe the symptoms of the problem and a different, though
probably not correct, Debian solution.

Also, ntpdate is deprecated in favor of "ntpd -g -q".  But the same issue
exists for ntpd.