Give Hydra binary caches a low priority

Dependencies

• [2] XE6HD7BP Provide the nix-cache-info file required by the binary cache substituter
• [3] ZE23JEJT Add a binary-cache-url file to channels to advertise the binary cache URL
• [4] MVB7RRLT * Move NARs from the NixChannel controller to the Root controller and
• [5] NHBGHO57 Set the Content-Type properly
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• replacement in src/lib/Hydra/Controller/Root.pm at line 205
  [2.230]→[2.230:252](∅→∅)
  − "WantMassQuery: 0\n"
  [2.230]

  [2.252]
  + "WantMassQuery: 0\n" .

  + # Give Hydra binary caches a very low priority (lower than the

  + # static binary cache http://nixos.org/binary-cache).

  + "Priority: 100\n"