[InterNetNews/inn] a958aa: delayer: Code cleanup

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: a958aab552ad5d2967bfcb5a0148d5f9fc30526d
      https://github.com/InterNetNews/inn/commit/a958aab552ad5d2967bfcb5a0148d5f9fc30526d
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2024-01-20 (Sat, 20 Jan 2024)

  Changed paths:
    M backends/delayer.in

  Log Message:
  -----------
  delayer: Code cleanup

* Enable strict and warnings, and declare variables.
* Use safe pipe open.
* Drop $eof, it's not used.

Thanks to Christoph Biedl for the patch.