I had thought of an issue of the breaks/replaces and tested with the first ppa
build.
Indeed old mail-stack-delivery postrm being triggered would mean a restoration
of the cofig before it's installation. This is not how we want it to be
transitioned-out.
Therefore case 11 of https://wiki.debian.org/PackageTransition does not apply
(as that would remove it).
Instead approach #2 would be to add an empty transitional that we will keep
until 20.04 to catch all upgrades dropping it without modifying the
configuration.
I tested an old install with mail-stack-delivery upgrading to the new version.
a) with breaks/replaces
triggers the unwanted remove as expected
b) with a transitional package
This does what we want
- turn it into an empty package
- does not rebuild the assumed old config
- the transitional can be removed without wreaking havok
Going on with B then ...
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https://bugs.launchpad.net/bugs/1771524
Title:
Merge newer dovecot for Cosmic
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