Subject: bug#57477: "guix refresh -u" sometimes 'unmirrors' source URLs

From: Maxime Devos <[email-masked]>
Date: Mon, 29 Aug 2022 20:15:57 +0200

The problem appears to be that latest-ftp-release in (guix 
gnu-maintenance) always constructs a ftp:// URL, even if mirror:// is 
desired.

Greetings,
Maxime