Update to 6.2.58.

• No owner defined in a list is no longer treated as error_config
• little bugfixes

Changelog: https://github.com/sympa-community/sympa/blob/6.2.58/NEWS.md

PR: 250973
Submitted by: dgeo@centrale-marseille.fr (maintainer)
Reviewed by: fernape@
Approved by: dgeo@centrale-marseille.fr (maintainer)