[pkg-gnupg-maint] Bug#993578: 90gpg-agent generator: `gpgconf --check-programs` can hang

[Ansgar]

Package: gpg-agent
Version: 2.2.27-2
Severity: normal
File: /usr/lib/systemd/user-environment-generators/90gpg-agent

The 90gpg-agent generator calls `gpgconf --check-programs` which calls
`dirmngr` which tries to connect to localhost:9050 (Tor) for some
reason.  This can hang, causing the generator to timeout (and thus the
systemd --user instance as well) and causing 90s delay for logins.

This issue was reported once a few days ago in #-devel (user
configured firewall to drop packets, even on the lo interface) and
today on #-systemd (not sure why connection to localhost:9050 did not
succeed, Tor should even be available).

The generator should avoid relying on network operations that
potentially hang/time out.

Ansgar