Use /etc/nix/machines

Dependencies

• [2] HTL6HIBM machine-status: Read /etc/nix.machines instead of using the BuildMachines table
• [3] PMNWRTGJ Add multiple output support
• [4] U5ZWDBW3 Ensure that each eval is compared to the previous one from the same jobset
• [5] 6ZB4CIW6 Security: Improve checking of build products
• [*] 2GK5DOU7 * Downloading closures.

Change contents

• replacement in src/lib/Hydra/Helper/Nix.pm at line 413
  [2.441]→[2.441:515](∅→∅)
  − my $machinesConf = $ENV{"NIX_REMOTE_SYSTEMS"} || "/etc/nix.machines";
  [2.441]

  [2.515]
  + my $machinesConf = $ENV{"NIX_REMOTE_SYSTEMS"} || "/etc/nix/machines";