[InterNetNews/inn] 0c1f55: Better document how to use -s with nnrpd

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 0c1f55944fd45d84f0c43eeae1f0859f6ce63c97
      https://github.com/InterNetNews/inn/commit/0c1f55944fd45d84f0c43eeae1f0859f6ce63c97
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-04-14 (Fri, 14 Apr 2023)

  Changed paths:
    M contrib/sample.init.script
    M doc/pod/install.pod
    M doc/pod/nnrpd.pod
    M nnrpd/nnrpd.c

  Log Message:
  -----------
  Better document how to use -s with nnrpd