[InterNetNews/inn] dab8cd: stathist: Improve the robustness of the script

[Julien ÉLIE]

  Branch: refs/heads/2.7
  Home:   https://github.com/InterNetNews/inn
  Commit: dab8cd854a7b71b7f61e00d5cfba2e442dba93c2
      https://github.com/InterNetNews/inn/commit/dab8cd854a7b71b7f61e00d5cfba2e442dba93c2
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2022-09-10 (Sat, 10 Sep 2022)

  Changed paths:
    M contrib/stathist.in

  Log Message:
  -----------
  stathist: Improve the robustness of the script

Skip malformed lines (notably when still not totally written, or
partially written when INN is stopped).