* gnu/packages/haskell.scm (ghc-http): New variable.

* gnu/packages/haskell.scm (ghc-network-uri): New variable.

* gnu/packages/haskell.scm (ghc-network): New variable.

* gnu/packages/haskell.scm (ghc-vector): New variable.

* gnu/packages/haskell.scm (ghc-parsec): New variable.

* gnu/packages/haskell.scm (ghc-split): New variable.

* gnu/packages/haskell.scm (ghc-unordered-containers): New variable.

* gnu/packages/haskell.scm (ghc-fgl): New variable.

* gnu/packages/haskell.scm (ghc-containers): New variable.

* gnu/packages/haskell.scm (ghc-syb): New variable.

* gnu/packages/haskell.scm (ghc-case-insensitive): New variable.

* gnu/packages/haskell.scm (ghc-quickcheck): New variable.

* gnu/packages/haskell.scm (ghc-tf-random): New variable.

* gnu/packages/haskell.scm (ghc-primitive): New variable.

* gnu/packages/haskell.scm (ghc-random): New variable.

* gnu/packages/haskell.scm (ghc-hunit): New variable.

* gnu/packages/haskell.scm (ghc-hashable): New variable.

* gnu/packages/haskell.scm (ghc-text): New variable.

* gnu/packages/haskell.scm (ghc-parallel): New variable.

* gnu/packages/haskell.scm (ghc-stm): New variable.

* gnu/packages/haskell.scm (ghc-zlib): New variable.

* gnu/packages/haskell.scm: (ghc-paths): New variable.

* gnu/packages/haskell.scm: (ghc-mtl): New variable.

* guix/profiles.scm (ghc-package-cache-file): New procedure.
  (profile-derivation): Add 'ghc-package-cache?' keyword argument.  If true
  (the default), add the result of 'ghc-package-cache-file' to 'inputs'.
* guix/scripts/package.scm (guix-package)[process-actions]: Pass
  #:ghc-package-cache? to 'profile-generation'.
* tests/packages.scm ("--search-paths with pattern"): Likewise.
* tests/profiles.scm ("profile-derivation"): Likewise.

* guix/build/haskell-build-system.scm (%standard-phases): move 'haddock phase
  before 'install phase.
* guix/build/haskell-build-system.scm (haddock): Simplify it as the 'install
  phase takes care of copying files.
* guix/build/haskell-build-system.scm (configure): Add '--libsubdir' flag.
  Fix use of '--extra-include-dirs' and '--extra-lib-dirs' flags.  Use 'doc',
  'bin' and 'lib' outputs if they are defined.
* guix/build/haskell-build-system.scm (make-ghc-package-database, register):
  Aligh location of 'package.conf.d' directory with '--libsubdir' flag.

* guix/import/hackage.scm: New file.
* tests/hackage.scm: New file.

* guix/scripts/import.scm (importers): Add hackage.
* guix/scripts/import/hackage.scm: New file.
* po/guix/POTFILES.in: Add guix/scripts/import.scm.
* doc/guix.texi: Add section on 'hackage' importer.

* gnu/packages/gnome.scm (libsecret): New variable.

* configure.ac: Use 'AM_SILENT_RULES'.

* gnu/packages/package-management.scm (guix-devel): Update to 0b131612.

* tests/guix-package-net.sh: Reinstate networking and shebang test that
  inadvertently vanished in commit 57b86237.

* gnu/packages/patches/inetutils-syslogd.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/admin.scm (inetutils)[source]: Use it.
  [native-inputs]: New field.

* gnu/packages/julia.scm (julia)[arguments]: Pass "MARCH" flag for supported
  architectures.

* gnu/packages/julia.scm (julia): Add 'supported-systems' field.

* gnu/packages/audio.scm (wavpack)[arguments]: New field.

Suggested by Mark H Weaver.

* doc/guix.texi (Setting Up the Daemon): Add xref to "Substitutes".

* doc/guix.texi (Package Modules): Mention the relation between module
  names and file names.

* doc/guix.texi (Invoking guix package): Mention that the current
  generation is not deleted.  This is a followup to d26eb84d.

* gnu/packages/linux.scm (kbd): Update to 2.0.2.

* gnu/packages/python.scm (python-drmaa, python2-drmaa): New variables.