This modifies usernames of ActivityPub accounts to use the @example@example.tld
format with an additional optional port component (e.g. @user@example.tld:42).
This allows accounts from ActivityPub servers with more relaxed username
requirements than those of Forgejo's to interact with Forgejo. Forgejo would
also follow a "de facto" standard of ActivityPub implementations.
By separating different information using @'s, we also gain future
opportunities to store more information about ActivityPub accounts internally,
so that we won't have to rely on e.g. the amount of dashes in a username as
my migration currently does.
Continuation of Aravinth's work: https://codeberg.org/forgejo/forgejo/pulls/4778
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9254
Reviewed-by: jerger <jerger@noreply.codeberg.org>
Reviewed-by: Ellen Εμιλία Άννα Zscheile <fogti@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Panagiotis "Ivory" Vasilopoulos <git@n0toose.net>
Co-committed-by: Panagiotis "Ivory" Vasilopoulos <git@n0toose.net>
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