[InterNetNews/inn] d869c9: External auth: All the fields are always returned

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: d869c9cd324839dfa67214063d13e3182db6dba5
      https://github.com/InterNetNews/inn/commit/d869c9cd324839dfa67214063d13e3182db6dba5
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-09-17 (Sun, 17 Sep 2023)

  Changed paths:
    M doc/pod/external-auth.pod

  Log Message:
  -----------
  External auth: All the fields are always returned

Document that the fields are "always" returned, instead of saying they
"generally" are.

Thanks to ReK2 (Hispagatos) for the suggestion of documentation
improvement.