Hello Adolf, hello development folks,
sorry for my tardy reply.
Is IPFire using the 1.4 Branch because there is some historic requirement for the older insecure keys.
(Assuming this was a question:) To my knowledge, we do not have key material in operation that would not be supported by GnuPG 2.x - the "classic" branch simply is more lightweight than the 2.x branch.
The last time I looked at this, GnuPG 2.x required some flavour of the "pinentry" helper for entering passphrases, and won't compile without. Since there is no manual interaction on a firewall, "pinentry" is useless, but I was unable to work out how to omit it in GnuPG 2.x .
Things could have been changed, meanwhile. Perhaps this is now possible, so if you have some spare time to look at this, go ahead. :-)
Thank you very much in advance for your efforts - and all your patches of the last weeks.
Thanks, and best regards, Peter Müller