fix #425: parsable config by hydra-queue-runner

Dependencies

• [2] IKJBYIGY Update to reflect BinaryCacheStore changes
• [3] PMDWFZHW hydra-module.nix: Fix setting the logo
• [4] 4J33F22T hydra-module.nix: Make it possible to add extra config lines
• [5] KKHVM4KA Move GC roots to /nix/var/nix/gcroots/hydra
• [*] D3MDJONY

Change contents

• replacement in hydra-module.nix at line 233
  [3.232]→[2.0:67](∅→∅)
  − use-substitutes ${if cfg.useSubstitutes then "1" else "0"}
  [3.232]

  [3.373]
  + use-substitutes = ${if cfg.useSubstitutes then "1" else "0"}