the GnuPG status code GOOD_PASSPHRASE appears to no longer be emitted by 2.1.15,
even though it was emitted by earlier versions of GnuPG.
I recognize that in the non-loopback pinentry mode, GOOD_PASSPHRASE isn't
necessarily meaningful (it would have to be reported by the agent anyway).
I'm seeing test suites in systems like request-tracker that expect to see a
password verification if they've supplied a --password-fd or something similar,
but no such status notification is returned to the caller of gpg. This seems
like an unfortunate regression -- how is a caller of gpg supposed to know
whether to look for such a status message or not? it is documented in DETAILS,
but doesn't appear to be actually used by the GnuPG code in 2.1.15.
But could