[InterNetNews/inn] 171ab2: thdexpire: Proof-read POD documentation

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 171ab278b77e32525808c2eeed47e87083b391bb
      https://github.com/InterNetNews/inn/commit/171ab278b77e32525808c2eeed47e87083b391bb
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-01-24 (Tue, 24 Jan 2023)

  Changed paths:
    M contrib/thdexpire.in

  Log Message:
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  thdexpire: Proof-read POD documentation

Add missing -M flag in documentation, and fix L<"FILES"> link.