openpgp: disable Tor use in dirmngr

Pass 'no-use-tor' to avoid automagically using Tor if it's available
on the system (which gnupg does by default)!

This often causes connectivity issues and is a source of great confusion
for users.

See also d54fc1c3f35dca78a66dde10b857ab9ee54c68bc in getuto.

Signed-off-by: Sam James <sam@gentoo.org>
Closes: #34
Signed-off-by: Michał Górny <mgorny@gentoo.org>

gemato/openpgp.py

@@ -1,5 +1,5 @@
 # gemato: OpenPGP verification support
-# (c) 2017-2023 Michał Górny
+# (c) 2017-2024 Michał Górny
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 import base64
@@ -413,10 +413,13 @@ def __init__(self, debug=False, proxy=None, timeout=None):
 
         with open(os.path.join(self._home, 'dirmngr.conf'), 'w') as f:
             f.write(f'''# autogenerated by gemato
-
 # honor user's http_proxy setting
 honor-http-proxy
 
+# Disable automagically using Tor when running.  This often leads
+# to connectivity issues and is unexpected for users.
+no-use-tor
+
 # The default of "recursive-resolver" (see "man dirmngr") may cause
 # problems with corporate networks, where this is often prohibited.
 # It's better to setup the DNS resolver of your choice correctly