[InterNetNews/inn] 39725c: news2mail: Improve the parsing of the mta command

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 39725cb27d43faee4aa37d0f11c9ea54b2d91934
      https://github.com/InterNetNews/inn/commit/39725cb27d43faee4aa37d0f11c9ea54b2d91934
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-04-14 (Fri, 14 Apr 2023)

  Changed paths:
    M backends/news2mail.in

  Log Message:
  -----------
  news2mail: Improve the parsing of the mta command

Remove -f from the mta command line as news2mail sets an envelope
sender itself.

Remove -oem as news2mail sets -oee.