What is the permissible character set for @group references in path-based auth?
From: sebb <sebbaz_at_gmail.com>
Date: Sat, 14 Dec 2019 09:12:15 +0000
The only documentation I could find  defines a key using <text-char>:
<text-char> ::= (any character except <LF>)
However the character domain is not specified as far as I can tell.
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