Upgrading/changing from PGP to GnuPG for nl.*

Hi, Julien invited me to join news.admin.hierarchies.

As administrator for nl.* I'm still using PGP-2 and that doesn't seem to
do its work anymore on a modern Fedora 40 system without 32-bit libraries.
$ file /usr/local/bin/pgp
/usr/local/bin/pgp: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, stripped
$ readelf -a /usr/local/bin/pgp | grep NEEDED
0x00000001 (NEEDED)                     Shared library: [libc.so.6]
$ rpm -qa | grep i686 | wc -l
0
$ dnf provides /lib/libc.so.6 | grep x86_64
glibc32-2.39-8.fc40.x86_64 : The GNU libc libraries (32-bit)

In the past I've compiled PGP-2.6.3is myself and configured 'signcontrol' for
the nl-hierarchy.  It doesn't compile anymore, not necessarily a disaster, as
we will see.

Now I could go ahead and install the necessary compatible libraries for PGP,
but there's also the option of moving to a more modern approach and the use of
GnuPG:
$ rpm -q gnupg2
gnupg2-2.4.4-1.fc40.x86_64

Before I can use GPG in the Usenet-hierarchy 'nl' I need to register its key
and this is probably the first thing that I should do.  Where do I do that?
Before registering I also need to generate the new key.  How do I do that?

A step-by-step-approach works best for me as I don't want to make any fatal
mistakes.

The next thing to do is probably configuring a new 'signcontrol' (Perl) and
getting that new 'signcontrol' to work.  Julien already pointed me to
https://ftp.isc.org/pub/pgpcontrol/signcontrol and there's much resemblance
to my version from 1998.  I've made some local changes there to accommodate
a few particular needs for nl.* (in 2002).  The version from 1998 is v1.6.

From 1.9: "# -- Fix error reporting around lock files with PGP." - was that
the error that I fixed in 2002? :-) [variable $lock vs. $pgplock]

Adri