Boot and minimally test images before declaring them as good
and switching to using them.
If image build/boot/test fails, upload report about this to dashboard.
Provide better errors from bug update command.
In particular, distinguish between bad updates and internal errors.
Also better messages.
Allow duping onto closed bugs.
Don't allow unduping from closed bugs.
- save Message-ID and use In-Reply-To in subsequent messages
- remember additional CC entries added manually
- don't mail to maintainers if maintainers list is empty
- improve mail formatting and add a footer
- implement upstream/fix/dup/invalid commands over email
- add tests
Detect when we send first/non-first email for a bug.
Detect when we send moderation/non-moderation email for a bug.
Fix setting repro level in email reports.
Add end-to-end email reporting tests.
json decoding behavior is somewhat surprising
(see // https://github.com/golang/go/issues/21092).
This behavior is especially easy to hit in tests
that reuse reply objects.
To avoid any surprises, we zero the reply.
