[InterNetNews/inn] ad9931: ovdb_init: Use setsid() only if available

[Julien ÉLIE]

  Branch: refs/heads/2.7
  Home:   https://github.com/InterNetNews/inn
  Commit: ad9931cc5cab0772e48b709a342327fc7bf1ab35
      https://github.com/InterNetNews/inn/commit/ad9931cc5cab0772e48b709a342327fc7bf1ab35
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-01-24 (Tue, 24 Jan 2023)

  Changed paths:
    M frontends/ovdb_init.c

  Log Message:
  -----------
  ovdb_init: Use setsid() only if available