Remove outdated email address

Dependencies

• [2] XQ3YV2T3 Don't pollute the source directory
• [3] Q6VFUIC6 Remove hydra-eval-guile-jobs
• [4] QGLBQ5IO Remove hydra-eval-guile-jobs
• [5] Y6H7Y3OT Capture the path to `guile', when available.
• [6] UHMUHQMU hydra: fix tarball build, add pre suffix to tarballs
• [7] UPRNM2PP configure.ac: Declare we're using the serial test harness
• [8] NNQ7IQJX set scripts to executable
• [9] FV2M6MOT hydra: use autoconf/-make
• [10] QNX2BXVA hydra: Improve `AC_INIT' call.
• [11] 3HVZCXJR Shut up warnings

Change contents

• replacement in configure.ac at line 1
  [5.15951]→[5.0:138](∅→∅)
  − AC_INIT([Hydra], [m4_esyscmd([echo -n $(cat ./version)$VERSION_SUFFIX])],

  − [nix-dev@cs.uu.nl], [hydra], [http://nixos.org/hydra/])
  [5.15951]

  [2.0]
  + AC_INIT([Hydra], [m4_esyscmd([echo -n $(cat ./version)$VERSION_SUFFIX])])
• edit in configure.ac at line 78
  [5.712]→[4.0:45](∅→∅)
  − AC_CONFIG_COMMANDS([executable-scripts], [])
• resolve order conflict in configure.ac at line 78
  [3.45]

  [5.34]