bug#37556: gpg "-unknown" version string

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Mon, 30 Sep 2019 09:49:06 +0200
> Cc: Lars Ingebrigtsen <larsi@gnus.org>, 37556@debbugs.gnu.org
> 
> Chopping would mean that 2.2.17 and 2.2.17-unknown are equal, but currently 
> 2.2.17-unknown (in epg) is less
> than 2.2.17.

You are saying that -unknown is in this case the same as -alpha.  My
problem is how to be sure this is the case everywhere where -unknown
could be used.