How to warn about need to port changes to new configuration file?

[Thomas Hood <jdthood@gmail.com>]

It is planned that an upcoming version of resolvconf will add a new hook 
script for isc-dhcp-client which is identical to the existing one for 
dhcp3-client.  An administrator who has made local changes to the latter 
hook script should probably make the same changes to the former.

Is there a need to warn the administrator that he should (presumably) 
re-implement his changes in the new file?  If so, what is the best way 
to warn him?  Should debconf notes be used?
--
Thomas Hood