File perms for conf files

[Robert J. Hansen]

So, as some of you may remember, I've been working on something to help
users back up their user directories and migrate them to new machines.
We really have no good tools at present to do this, so I'm putting
together a small Qt application to make this easier.

	https://github.com/rjhansen/sherpa

(Note: it is not complete and not ready for user testing.)

It *almost* works on macOS and Linux; it's a little further from
finished on Windows.  I'm now at the point where I need to restore files
from a zip archive, and part of that means ensuring I have the correct
POSIX permissions on each file.

The files which, if present, are backed up:

gpg-agent.conf
gpg.conf
pubring.gpg
secring.gpg
trustdb.gpg
pubring.kbx
sshcontrol
dirmngr.conf
gpa.conf
scdaemon.conf
gpgsm.conf
policies.txt
trustlist.txt
scd-event
tofu.db
gpg.conf-2.1
gpg.conf-2.0
gpg.conf-2
gpg.conf-1.4
gpg.conf-1
crls.d/*
openpgp-revocs.d/[A-Fa-f0-9]{40}\.rev
private-keys-v1.d/[A-Fa-f0-9]{40}\.key



So, two questions:

(a) Is this list missing anything important?
(b) What's the official, GnuPG-approved permission for each?

(Oh, sure, I could just assume my GnuPG installation had correct perms
and use those.  But for something like this, I'd like to be sure.)