[InterNetNews/inn] 8a642f: Update wording about innmail and the configured MTA

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 8a642fb78f88b703a3948de19ad87e393f596f72
      https://github.com/InterNetNews/inn/commit/8a642fb78f88b703a3948de19ad87e393f596f72
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-01-23 (Mon, 23 Jan 2023)

  Changed paths:
    M doc/FAQ
    M doc/pod/inn.conf.pod
    M doc/pod/innmail.pod
    M doc/pod/news2mail.pod
    M include/inn/innconf.h

  Log Message:
  -----------
  Update wording about innmail and the configured MTA

innmail is not invoked for mailing reports of control messages.
Be more accurate about the wording of what innmail and the configured
MTA actually do.