refresh: Honor '--key-server'.

Previously, the '--key-server' option would be ignored in an invocation
like:

  ./pre-inst-env guix refresh python-scipy=1.8.1 -t pypi -u \
     --key-server=pgp.mit.edu

* guix/upstream.scm (download-tarball): Add #:key-server parameter and
pass it to 'gnupg-verify*'.
(package-update/url-fetch, package-update/git-fetch)
(package-update): Likewise.
* guix/scripts/refresh.scm (update-package): Add #:key-server and pass
it down to 'package-update'.
(guix-refresh): Pass #:key-server to 'update-package'.

0 files changed, 0 insertions, 0 deletions