Drop remaining sha1_hex references

Dependencies

• [2] TF5HAPRD export a /prometheus endpoint
• [3] LBNVQXUB * Build the /build stuff in a separate controller.
• [4] LSZLZHJY Allow users to edit their own settings
• [5] XFZ3ASK4 fix missing import of Nix::Store for isValidPath
• [6] J5UVLXOK * Start of a basic Catalyst web interface.
• [7] SZYDW2DG hydra: added some user admin
• [8] SMM4HQTP * Put actions related to builds under /build (e.g. /log/<buildid>
• [9] SGNXIOI4 Hydra/32: Add option to force evaluation of a certain jobset via web interface (for admins only)
• [10] ZWCTAZGL added newsitems, added some admin options to clear various caches.
• [11] 2T476X2P Remove the global channel
• [12] PALLP4UY is not in hydra-server's scope
• [13] SMCOU72F hydra: add some admin for adding/enabling/etc build machines
• [14] SHBLLAVH * More global substitution.
• [15] JLQN6QYH Revert "Remove the global channel"

Change contents

• edit in src/lib/Hydra/Controller/Admin.pm at line 9
  [3.25]→[3.58:89](∅→∅)
  − use Digest::SHA1 qw(sha1_hex);
• edit in src/lib/Hydra/Controller/Root.pm at line 10
  [3.42]→[3.3010:3041](∅→∅),[2.48]→[3.3010:3041](∅→∅),[3.3368]→[3.3010:3041](∅→∅)
  − use Digest::SHA1 qw(sha1_hex);