* gnu/services/avahi.scm (configuration-file): Use 'plain-file' instead
  of 'text-file'.
  (avahi-service): Turn into a regular procedure that returns a <service>.
* gnu/services/base.scm (root-file-system-service, file-system-service,
  user-unmount-service, user-processes-service, host-name-service,
  console-keymap-service, console-font-service, mingetty-service,
  nscd.conf-file, nscd-service): Likewise.
  (%default-syslog.conf): New variable.
  (syslog-service): Use it.  Turn into a regular procedure.
  (guix-service, udev-rules-union, kvm-udev-rule, udev-service,
  device-mapping-service, swap-service): Likewise.
* gnu/services/databases.scm (%default-postgres-hba,
  %default-postgres-ident): Use 'plain-file' instead of 'text-file'.
  (%default-postgres-config): Use 'mixed-text-file' instead of
  'text-file*'.
  (postgresql-service):  Use 'program-file' instead of 'gexp->script'.
  Turn into a regular procedure.
* gnu/services/desktop.scm (dbus-configuration-directory): Use
  'computed-file' instead of 'gexp->derivation'.
  (upower-configuration-file, geoclue-configuration-file,
  elogind-configuration-file): Use 'plain-file' instead of 'text-file'.
  (dbus-service, upower-service, colord-service, geoclue-service,
  polkit-service, elogind-service): Turn into regular procedures.
  (%desktop-services): Remove use of 'mlet' when iterating on
  %BASE-SERVICES.
* gnu/services/lirc.scm (lirc-service): Turn into a regular procedure.
* gnu/services/networking.scm (static-networking-service,
  dhcp-client-service, ntp-service, tor-service, bitlbee-service,
  wicd-service): Likewise.
* gnu/services/ssh.scm (lsh-service): Likewise.
* gnu/services/web.scm (nginx-service): Likewise.
* gnu/services/xorg.scm (xorg-configuration-file): Use 'mixed-text-file'
  instead of 'text-file*'.
  (xorg-start-command, slim-service): Turn into regular procedures.
  (xinitrc): Use 'program-file' instead of 'gexp->script'.
* gnu/system/install.scm (cow-store-service,
  configuration-template-service): Turn into regular procedures.
* gnu/system.scm (other-file-system-services, device-mapping-services,
  swap-services, essential-services, operating-system-services,
  user-shells, operating-system-accounts): Remove now unnecessary
  'mlet' and turn into regular procedures.
  (operating-system-etc-directory, operating-system-activation-script,
  operating-system-boot-script): Adjust accordingly.
* doc/guix.texi (Base Services, Networking Services, X Window, Desktop
  Services, Database Services, Web Services, Various Services, Name
  Service Switch): Adjust accordingly.

* gnu/services/base.scm (mingetty-service): Change default value of
  #:motd from a monadic value to a <plain-file>.  Assume MOTD to be a
  file-like object.  Assume LOGIN-PROGRAM is a gexp or #f.
  (%base-services): Use 'plain-file' instead of 'text-file' for motd.
* gnu/system/linux.scm (unix-pam-service): Update docstring to mention
  that MOTD is a file-like object.
* doc/guix.texi (Base Services): Adjust 'mingetty-service' documentation
  accordingly.
* gnu/system/install.scm (installation-services): Adjust accordingly.
  (log-to-info): Use 'program-file' instead of 'gexp->script'.

* guix/gexp.scm (mixed-text-file): New procedure.
* tests/gexp.scm ("mixed-text-file"): New test.
* doc/guix.texi (G-Expressions): Document it.

* guix/gexp.scm (<program-file>): New record type.
  (program-file, program-file-compiler): New procedures.
* tests/gexp.scm ("program-file"): New test.
* doc/guix.texi (G-Expressions): Document it.

* guix/gexp.scm (<computed-file>): New record type.
  (computed-file, computed-file-compiler): New procedures.
* tests/gexp.scm ("lower-object, computed-file"): New test.
* doc/guix.texi (G-Expressions): Document 'computed-file'.

Before, call-with-clean-exit would *always* return an exit code of 1.

* gnu/build/linux-container.scm (call-with-clean-exit): Exit with status
  code of 0 if thunk does not throw an exception.
* tests/containers.scm: Add test.

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

* gnu/packages/python.scm (python-fixtures): Update.
* gnu/packages/python.scm (python-fixtures-0.3.16,
  python2-fixtures-0.3.16, python-pbr-0.11,
  python2-pbr-0.11): New variables.
* gnu/packages/python.scm (python-testrepository): Use python-fxitures-0.3.16
  instead of python-fixtures in the inputs.

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

Reported by Christopher Allan Webber <cwebber@dustycloud.org>.

* m4/guix.m4 (GUIX_LIBGCRYPT_LIBDIR): Add "grep -e -L" to the pipeline
  to account for cases where the output of "libgcrypt-config --libs"
  lacks a -L flag.
* configure.ac: When 'GUIX_LIBGCRYPT_LIBDIR' returns the empty string,
  set LIBGCRYPT_LIBDIR to "no".
* config-daemon.ac: Add missing space.

This allows for direct program invokation without needing a shell to act
as a command interpreter.

* guix/scripts/environment.scm (%default-shell): New variable.
  (show-help): Adjust description.  Remove '--exec' reference.
  (%default-options): Use '%default-shell'.
  (%options): Adjust '--exec' to run command via the default shell.
  (parse-args): New procedure.
  (guix-environment): Use 'parse-args'.  Use 'system*' instead of
  'system'.
* tests/guix-environment.sh: Add test for '--' command invokation.
* doc/guix.texi ("Invoking guix environment"): Use new syntax.  Remove
  '--exec' documentation.

* guix/utils.scm (split): New procedure.
* tests/utils.scm: Add tests.

Suggested by Ludovic Courtès <ludo@gnu.org>.

* emacs/guix-devel.el (guix-devel-setup-repl): Add a workaround for
  'guix-warning-port'.
  (guix-devel-lint-package): New command.
  (guix-devel-keys-map): Add key binding for it.
* doc/emacs.texi (Emacs Development): Document it.

* guix/scripts/lint.scm (run-checkers): Export.  Make 'checkers'
  argument optional.

* emacs/guix-devel.el (guix-devel-with-definition): New macro.
  (guix-devel-build-package-definition): Use it.
  (guix-devel-emacs-font-lock-keywords): New variable.

Setting up guix ports needs to be done in Geiser REPL synchronously,
otherwise this operation may not be finished before the further
evaluating of guile code.

* emacs/guix-guile.el (guix-guile-prompt?): New function.
* emacs/guix-geiser.el (guix-geiser-eval-in-repl-synchronously): New
  function.
* emacs/guix-devel.el (guix-devel-setup-repl): Use it.

* emacs/guix-build-log.el (guix-build-log-phase-toggle-all): Handle the
  case when there are no characters before the first phase:
  'guix-build-log-next-phase' moves to the second phase in such a case,
  and the toggling is not done properly, so use 're-search-forward'
  instead.

* emacs/guix-devel.el (guix-devel-modify-phases-font-lock-pre): Handle
  the case when 'modify-phases' is commented.

Suggested by Ludovic Courtès <ludo@gnu.org>.

* emacs/guix-devel.el (guix-devel-gexp-symbol): New face.
  (guix-devel-font-lock-keywords): Adjust to handle gexp symbols.

* gnu/packages/patches/libunwind-CVE-2015-3239.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/libunwind.scm (libunwind)[source]: Add patch.

* gnu/packages/patches/libwmf-CAN-2004-0941.patch,
  gnu/packages/patches/libwmf-CVE-2007-0455.patch,
  gnu/packages/patches/libwmf-CVE-2007-2756.patch,
  gnu/packages/patches/libwmf-CVE-2007-3472.patch,
  gnu/packages/patches/libwmf-CVE-2007-3473.patch,
  gnu/packages/patches/libwmf-CVE-2007-3477.patch,
  gnu/packages/patches/libwmf-CVE-2009-3546.patch: New files.
* gnu/packages/patches/libwmf-CVE-2015-0848+4588+4695+4696.patch: Delete
  file.  Replace with ...
* gnu/packages/patches/libwmf-CVE-2015-0848+CVE-2015-4588.patch,
  gnu/packages/patches/libwmf-CVE-2015-4695.patch,
  gnu/packages/patches/libwmf-CVE-2015-4696.patch: ... these new files.
* gnu-system.am (dist_patch_DATA): Adjust accordingly.
* gnu/packages/image.scm (libwmf)[source]: Adjust set of patches.

* gnu/packages/patches/unzip-increase-size-of-cfactorstr.patch: Delete
  file.  Replace with ...
* gnu/packages/patches/unzip-overflow-long-fsize.patch: ... this new file.
* gnu/packages/patches/unzip-attribs-overflow.patch,
  gnu/packages/patches/unzip-fix-overflows-and-infloop.patch,
  gnu/packages/patches/unzip-format-secure.patch: New files.
* gnu/packages/patches/unzip-CVE-2014-9636.patch: Replace contents with
  fixed patch from Fedora.
* gnu-system.am (dist_patch_DATA): Adjust accordingly.
* gnu/packages/zip.scm (unzip)[source]: Adjust list of patches.

* gnu/packages/patches/wpa-supplicant-2015-2-fix.patch,
  gnu/packages/patches/wpa-supplicant-2015-3-fix.patch,
  gnu/packages/patches/wpa-supplicant-2015-4-fix-pt1.patch,
  gnu/packages/patches/wpa-supplicant-2015-4-fix-pt2.patch,
  gnu/packages/patches/wpa-supplicant-2015-4-fix-pt3.patch,
  gnu/packages/patches/wpa-supplicant-2015-4-fix-pt4.patch,
  gnu/packages/patches/wpa-supplicant-2015-4-fix-pt5.patch,
  gnu/packages/patches/wpa-supplicant-2015-5-fix.patch,
  gnu/packages/patches/wpa-supplicant-CVE-2015-1863.patch: Delete files.
* gnu-system.am (dist_patch_DATA): Remove them.
* gnu/packages/admin.scm (wpa-supplicant-minimal): Update to 2.5.
  Remove patches.

* gnu/packages/python.scm (python-h5py)[arguments]: Add "fix-hdf5-paths"
  phase.

* gnu/packages/python.scm (python-h5py)
  [inputs]: Remove python-cython and python-numpy.
  [propagated-inputs]: New field.
  [native-inputs]: Drop python-setuptools and add python-cython.
  (python2-h5py): Replace "inputs" with "propagated-inputs".

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

This corrects a typo in 0d1c0660.

This reverts commit d04efa0f.

* gnu/packages/patches/webkitgtk-2.4-sql-init-string.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/webkit.scm (webkitgtk-2.4)[source]: Add patch.

* gnu/packages/video.scm (libvpx)[arguments]: Add "--size-limit"
  argument to configure.

* gnu/packages/patches/openjpeg-CVE-2015-6581.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/image.scm (openjpeg, openjpeg-2.0)[source]: Add patch.

* gnu/packages/ocaml.scm (camlp4)[inputs]: Removed duplicate "ocaml"
  entry from native-inputs.

* gnu/packages/gprolog.scm (gprolog)[supported-systems]: Remove
  armhf-linux from the list of supported systems.

* gnu/packages/ssh.scm (mosh): Update to 1.2.5.

* gnu/packages/enlightenment.scm (enlightenment): Update to 0.19.12.

* gnu/packages/web.scm (r-htmlwidgets): New variable.

* gnu/packages/web.scm (r-htmltools): New variable.

* gnu/packages/ibus.scm (ibus-libpinyin)[inputs]: Add gtk+.
  [native-inputs]: Add glib:bin.

If --with-frozenpaths is given, then configure will retain absolute paths
discovered for delegate programs, otherwise they are discarded.

* gnu/packages/imagemagick.scm (imagemagick)[arguments]: Add
  '--with-frozenpaths' to #:configure-flags.