gnu: linux-initrd: Mount /tmp as a tmpfs.

* gnu/packages/linux-initrd.scm (gnu-system-initrd): Make sure /root/tmp
  exists; mount it as a tmpfs.

gnu: Add net-base.

* gnu/packages/system.scm (net-base): New variable.

gnu: Add net-tools.

* gnu/packages/linux.scm (net-tools): New variable.

gnu: dmd: Download from alpha.gnu.org.

* gnu/packages/system.scm (dmd): Use the alpha.gnu.org URL.

gnu: harfbuzz: Update to 0.9.21.

* gnu/packages/gtk.scm (harfbuzz): Update to 0.9.21.

gnu: Add dvdisaster.

* gnu/packages/cdrom.scm (dvdisaster): New variable.

gnu: xf86-input-joystick: Fix installation path.

* gnu/packages/xorg.scm (xf86-input-joystick): Fix installation path.

gnu: xf86-input-vmmouse: Fix installation path.

* gnu/packages/xorg.scm (xf86-input-vmmouse): Fix installation path.

gnu: xf86-input-synaptics: Fix installation paths.

* gnu/packages/xorg.scm (xf86-input-synaptics): Fix installation paths.

gnu: zile: Fix references to /bin/sh.

* gnu/packages/zile.scm (zile): Add 'patch-/bin/sh' phase.  Move Perl
  and help2man to 'native-inputs'.

gnu: libksba: Update to 1.3.0.

* gnu/packages/gnupg.scm (libksba): Update to 1.3.0.

gnu: libgcrypt: Update to 1.5.3

* gnu/packages/gnupg.scm (libgcrypt): Update to 1.5.3.

gnu: gnupg: Update to 2.0.21.

* gnu/packages/gnupg.scm (gnupg): Update to 2.0.21.

gnu: pspp: Update to 0.8.1.

* gnu/packages/maths.scm (pspp): Update to 0.8.1.

gnu: fontconfig: Add and register gs-fonts.

* gnu/packages/fontutils.scm (fontconfig): Add gs-fonts as an input and
    register it in the configuration file; so any porgram using fontconfig
    should at least have the gs-fonts at its disposal.

gnu: guix: Rework 0.4 hack to gracefully handle lack of tarball.

* gnu/packages/package-management.scm (guix-0.4): Fall back to the
  source of GIUX when the tarball doesn't exist.

gnu: vm: Initialize the image's store.

* gnu/system/vm.scm (qemu-image): Add 'initialize-store?' keyword
  parameter.  Use 'guix-register' when INITIALIZE-STORE? is true.
  (system-qemu-image): Pass #:initialize-store? #t.

gnu: guix: Set $localstatedir; add gzip as input.

* gnu/packages/package-management.scm (guix): Add "--localstatedir=/var".
  Add GZIP as an explicit input, to avoid referring to the final gzip.

gnu: racket: Add dependency on GTK+.

* gnu/packages/scheme.scm (racket): Add dependency on GTK+ and
  gdk-pixbuf.

gnu: xorg: Fix xorg-server.

* gnu/packages/xorg.scm (xkbcomp-intermediate): New variable, serves as
    input to xkeyboard-config.
* gnu/packages/xorg.scm (xkeyboard-config): Add input xkbcomp-intermediate.
* gnu/packages/xorg.scm (xkbcomp): Add input xkeyboard-config.
* gnu/packages/xorg.scm (xorg-server): Adapt xkb paths and replace references
    to /bin/sh (with Ludovic Courtès <ludo@gnu.org>).