[InterNetNews/inn] 2c1f9a: Improve documentation of inews and rnews

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 2c1f9a3e37c75bdccb0170ef86f3eac49c477589
      https://github.com/InterNetNews/inn/commit/2c1f9a3e37c75bdccb0170ef86f3eac49c477589
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2024-02-11 (Sun, 11 Feb 2024)

  Changed paths:
    M doc/pod/inews.pod
    M doc/pod/rnews.pod

  Log Message:
  -----------
  Improve documentation of inews and rnews

Add examples, explain the use case of POST vs IHAVE, and no longer say
inews only posts to the local news server.