While investigating failing autopkgtests in debbugs, I noticed that
Debbugs::Estraier needs Search::Estraier.  This used to be in Debian,
but was removed
(https://tracker.debian.org/pkg/libsearch-estraier-perl), and the
dependency doesn't seem to be declared.

I'm not sure what to do about this.  Is there some other packaged
substitute we could use instead?  Or would we have to fix up
libsearch-estraier-perl and get it back into Debian?