enable system users for comment.LoadPoster (#28014) #28032
Merged
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Backport #28014 by @earl-warren
System users (Ghost, ActionsUser, etc) have a negative id and may be the author of a comment, either because it was created by a now deleted user or via an action using a transient token.
The GetPossibleUserByID function has special cases related to system users and will not fail if given a negative id.
Refs: https://codeberg.org/forgejo/forgejo/issues/1425
(cherry picked from commit 6a2d2fa24390116d31ae2507c0a93d423f690b7b)