[InterNetNews/inn] 35f0b3: Move delayer.in from contrib to backends

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 35f0b304e192a88b13aa8397fb04a226a21f3101
      https://github.com/InterNetNews/inn/commit/35f0b304e192a88b13aa8397fb04a226a21f3101
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2024-01-20 (Sat, 20 Jan 2024)

  Changed paths:
    M .gitignore
    M MANIFEST
    M backends/Makefile
    A backends/delayer.in
    M contrib/Makefile
    M contrib/README
    R contrib/delayer.in
    M support/mkmanifest

  Log Message:
  -----------
  Move delayer.in from contrib to backends

Install delayer as a main program, now that it has a decent
documentation and several improvements thanks to the work of Christoph
Biedl.  (Patches to come in the following commits.)