Update to 2.1.22.

Noteworthy changes in version 2.1.22

• gpg: Extend command --quick-set-expire to allow for setting the expiration time of subkeys.
• gpg: By default try to repair keys during import. New sub-option no-repair-keys for --import-options.
• gpg,gpgsm: Improved checking and reporting of DE-VS compliance.
• gpg: New options --key-origin and --with-key-origin. Store the time of the last key update from keyservers, WKD, or DANE.
• agent: New option --ssh-fingerprint-digest.
• dimngr: Lower timeouts on keyserver connection attempts and made it configurable.
• dirmngr: Tor will now automatically be detected and used. The option --no-use-tor disables Tor detection.
• dirmngr: Now detects a changed /etc/resolv.conf.
• agent,dirmngr: Initiate shutdown on removal of the GnuPG home directory.
• gpg: Avoid caching passphrase for failed symmetric encryption.
• agent: Support for unprotected ssh keys.
• dirmngr: Fixed name resolving on systems using only v6 nameservers.
• dirmngr: Allow the use of TLS over http proxies.
• w32: Change directory of the daemons after startup.
• wks: New man pages for client and server.

A detailed description of the changes found in this 2.1 branch can be
found at https://gnupg.org/faq/whats-new-in-2.1.html.