security/gnupg: Add pkg-message about potential connectivity issues

[jrm]

Summary

If your host does not have IPv6 connectivity, you may experience random
connection failures to dual-stack hkp servers [1]. As a workaround, add

disable-ipv6

to

%%PREFIX%%/etc/dirmngr.conf

[1] https://dev.gnupg.org/rGecfc4db3a2f8bc2652ba4ac4de5ca1cd13bfcbec

PR:
Submitted by:
Reported by:

[adamw]

Looks good here, but can you add "gnupg" somewhere in the initial sentence? When many packages have messages that are all output together at the end of a pkg run, it can sometimes be hard to tell what message applies to what package. Maybe "gnupg may experience random connection failures"?

Thanks for this!

[jrm]

Update pkg-message so that it is clear the message is about GnuPG (security/gnupg).

[adamw]