Rebase the patch which allows importing of keys without UIDs. The code
changed slightly with upstream 7aaedfb10 (gpg: Import stray revocation
certificates., 2022-10-28).
Bump the minimum required libksba to 1.6.3, per upstream fc8b81128
(Update NEWS for 2.4.0, 2022-12-16). Also increase libgpg-error to
1.46, per upstream c51139f2b (agent,w32: Support Win32-OpenSSH emulation
by gpg-agent., 2022-10-14).
Fix broken GPGME tests with the patch attached to T6313¹. The patch is
edited to apply the changes to Makefile.in rather than Makefile.am.
That avoids the need to run autoreconf.
¹ https://dev.gnupg.org/T6313#166375
