[pkg-gnupg-maint] More cherry-picking from STABLE-BRANCH-2-4?

[Andreas Metzler]

Hello,

apart from the recently picked 'gpg: Fix another regression due to the
T7547 fix.' there are a bunch of other fixes on upstream GIT that might
be worth picking:
cc3efe9a7312b1ca2c2398e439178e0b23e857df
gpg: Fix key generation with existing key from card.
GnuPG-bug-id: 7309, 7457

e212308ede8ecaa3a39ed0366db70da3edfc0ba2
gpgconf: Fix reload and kill of keyboxd.
GnuPG-bug-id: 7569

0812ab2996730eecc180dceab5e7a7f0a706c467
keyboxd: Searching UpperCaseAddress
GnuPG-bug-id: 7576


33d418fd34b55bdd30b0dc1a4ab2fe41cc6d2170
Fix access to the bintoasc mapping in the libksba support.
(Description on the mailinglist by by Collin Funk):
(has_only_base64): Use memchr since calling strchr on a non-NUL
terminated string is undefined behavior.

cu Andreas
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