gnu: Add xmonad.

* gnu/packages/wm.scm (xmonad): New variable.

Co-authored-by: Eric Bavier <bavier@member.fsf.org>

services: elogind-configuration: Disable hibernation key by default.

* gnu/services/desktop.scm (<elogind-configuration>): Change the default value
  of the 'handle-hibernate-key' field to 'ignore'.

services: Add udev rules for (upower colord elogind) to %desktop-services.

* gnu/services/desktop.scm (%desktop-services): Replace the 'udev-service'
  from %base-services.
* gnu/services/base.scm (%base-services): Add a comment to keep them in sync.

file-systems: Add %elogind-file-systems; add it to %base-file-systems.

* gnu/system/file-systems.scm (%elogind-file-systems): New variable.
  (%base-file-systems): Add %elogind-file-systems.

guix build: '--log-file' can return URLs.

* guix/scripts/build.scm (%default-log-urls): New variable.
  (log-url): New procedure.
  (guix-build): Use it.
* doc/guix.texi (Invoking guix build): Document it.

http-client: Backport delimited input port fix from Guile.

* guix/http-client.scm (make-delimited-input-port): Backport Guile
  commit 5a10e41.
  Monkey-patch 'make-delimited-input-port' for any Guile <= 2.0.11.

http-client: Remove redundant import clause.

* guix/http-client.scm: Remove redundant #:use-module (guix utils).

gnu: gnucash: Add Finance::Quote support.

* gnu/packages/patches/gnucash-price-quotes-perl.patch: New patch.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/gnucash.scm (gnucash)[source]: Use it.
  [inputs]: Add perl-date-manip and perl-finance-quote.
  [arguments]: Add 'wrap-programs' phase.  Move below inputs.

guix: packages: Add transitive-input-references.

* guix/packages.scm (transitive-input-references): New procedure.
* gnu/packages/version-control.scm (package-transitive-propagated-labels*)
  (package-propagated-input-refs): Delete.
  (git)[arguments]: Adjust to transitive-input-references.

gnu: Add perl-finance-quote.

* gnu/packages/web.scm (perl-finance-quote): New variable.
* gnu/packages/patches/perl-finance-quote-unuse-mozilla-ca.patch: New patch.
* gnu-system.am (dist_patch_DATA): Add it.

gnu: Add perl-date-manip.

* gnu/packages/perl.scm (perl-date-manip): New variable.

gnu: Add perl-html-tableextract.

* gnu/packages/web.scm (perl-html-tableextract): New variable.

gnu: Add perl-html-element-extended.

* gnu/packages/web.scm (perl-html-element-extended): New variable.

gnu: ffmpeg: Update to 2.8.

* gnu/packages/video.scm (ffmpeg): Update to 2.8.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

pull: Update to the new cgit snapshot URL.

* guix/scripts/pull.scm (%snapshot-url): Update to the new URL.

gnu: gdb: Remove headers and libraries already in Binutils.

* gnu/packages/gdb.scm (gdb)[arguments]: Add #:modules.  Rename
  'post-install' phase to 'remove-libs-already-in-binutils'.  Change it
  to compute the intersection of the set of headers and libraries of GDB
  vs. Binutils and to remove each of the files found in both.

gnu: gdb: Use 'modify-phases'.

* gnu/packages/gdb.scm (gdb)[arguments]: Use 'modify-phases'.

gnu: gdb: Update to 7.10.

* gnu/packages/gdb.scm (gdb): Update to 7.10.

linux-initrd: Compress cpio archives deterministically.

* gnu/build/linux-initrd.scm (write-cpio-archive): Use '--no-name'.

gnu: xfce4-settings: Set the default icon theme to "gnome".

Fixes <http://bugs.gnu.org/21217>.

* gnu/packages/patches/xfce4-settings-defaults.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/xfce.scm (xfce4-settings)[source]: Add patch.