Bug#917535: debian-archive-keyring: ftp-master key for buster

[Niels Thykier <niels@thykier.net>]

Package: debian-archive-keyring
Version: 2017.5
Severity: serious

Hi,

We need new archive signing keys for buster, so we can include them in
a debian-archive-keyring upload before the buster release.

Thanks,
~Niels

(If we need a better template, please help us with an update to
https://wiki.debian.org/Teams/ReleaseTeam/ReleaseCheckList/, which
currently uses #860830 as a reference)