Log Message:
gnupg2: updated to 2.2.21

Noteworthy changes in version 2.2.21
* gpg: Improve symmetric decryption speed by about 25%.
* gpg: Support decryption of AEAD encrypted data packets.
* gpg: Add option --no-include-key-block.
* gpg: Allow for extra padding in ECDH.
* gpg: Only a single pinentry is shown for symmetric encryption if
  the pinentry supports this.
* gpg: Print a note if no keys are given to --delete-key.
* gpg,gpgsm: The ridiculous passphrase quality bar is not anymore
  shown.
* gpgsm: Certificates without a CRL distribution point are now
  considered valid without looking up a CRL.  The new option
  --enable-issuer-based-crl-check can be used to revert to the
  former behaviour.
* gpgsm: Support rsaPSS signature verification.
* gpgsm: Unless CRL checking is disabled lookup a missing issuer
  certificate using the certificate's authorityInfoAccess.
* gpgsm: Print the certificate's serial number also in decimal
  notation.
* gpgsm: Fix possible NULL-deref in messages of --gen-key.
* scd: Support the CardOS 5 based D-Trust Card 3.1.
* dirmngr: Allow http URLs with "LOOKUP --url".
* wkd: Take name of sendmail from configure.  Fixes an OpenBSD
  specific bug.