allow users to opt-out for chroot retention policy emails

[fedora-copr-github-bot]

Original issue: https://pagure.io/copr/copr/issue/596 Opened: 2019-03-19 14:10:45 Opened by: praiskup

Now, all users will receive email for every project. It would be nice to have per-project (or even per user) option which would allow users to opt-out for the retention policy emails.... I can imagine that in 90% people don't care, unless our retention policy is too aggressive.

By not aggressive policy, in example, I mean:

• The latest released version of fedora is F29
• So also F28 is still supported
• We just disabled F27 for new builds...
• We keep chroots for 'latest supported fedora release - 2', which would mean that F26+ is not deleted yet

In some case, I don't care at all .... but usually, if some user is using software I shipped in Copr, I don't want to be the maintainer who enforces the users to migrate from just now EOLed Fedoras.

So in the current policy (i think we plan to remove even fedora 27) I'd (as a copr user) probably prolong the F26+ for most of my projects. But seriously, we should keep at least Fedora 27 for some time by default.

[praiskup]

Triage time: we still think that it would be useful to opt-out from unwanted e-mails