gnu: wayland: Build documentation.

* gnu/packages/freedesktop.scm (wayland)[native-inputs]: Add graphviz.

gnu: python-pillow: Update to 3.1.0.

* gnu/packages/python.scm (python-pillow): Update to 3.1.0.
[source]: Change to pypi uri syntax.

gnu: Add aseprite.

* gnu/packages/game-development.scm (aseprite): New variable.

gnu: Add allegro-4.

* gnu/packages/game-development.scm (allegro-4): New variable.

gnu: obs: Update to 0.13.0.

* gnu/packages/video.scm (obs): Upgrade to 0.13.0.

gnu: perl-tk: Update to 804.033.

* gnu/packages/tcl.scm (perl-tk): Update to 804.033.
[source]: Remove patch.
* gnu/packages/patches/perl-tk-x11-discover.patch: Remove file.
* gnu-system.am (dist_patch_DATA): Remove patch.

gnu: weechat: Update to 1.4.

* gnu/packages/weechat.scm (weechat): Update to 1.4.

gnu: pumpa: Update to 0.9.2.

* gnu/packages/pumpio.scm (pumpa): Update to 0.9.2.
[source]: Add 'file-name' field.

Rename 'dmd' to 'shepherd' in comments and strings.

* build-aux/hydra/demo-os.scm (operating-system)[issue]: Point to
  shepherd instead of dmd.
* ROADMAP: Likewise.
* gnu/build/install.scm (directives): Adjust comment.

services: Rename 'dmd' services to 'shepherd'.

* gnu/services/shepherd.scm (dmd-root-service-type, %dmd-root-service)
  (dmd-service-type, <dmd-service>, dmd-service, dmd-service?)
  (make-dmd-service, dmd-service-documentation, dmd-service-provision)
  (dmd-service-requirement, dmd-service-respawn, dmd-service-start)
  (dmd-service-stop, dmd-service-auto-start?, dmd-service-modules)
  (dmd-service-imported-modules, dmd-service-file-name, dmd-service-file)
  (dmd-service-back-edges): Rename to...
  (shepherd-root-service-type, %shepherd-root-service, shepherd-service-type)
  (<shepherd-service>, shepherd-service, shepherd-service?)
  (make-shepherd-service, shepherd-service-documentation)
  (shepherd-service-provision, shepherd-service-requirement)
  (shepherd-service-respawn, shepherd-service-start)
  (shepherd-service-stop, shepherd-service-auto-start?)
  (shepherd-service-modules, shepherd-service-imported-modules)
  (shepherd-service-file-name, shepherd-service-file)
  (shepherd-service-back-edges): ...this
* gnu/services.scm: Adjust comments.
* gnu/services/avahi.scm (avahi-dmd-service): Rename to...
  (avahi-shepherd-service): ... this.
* gnu/services/base.scm (%root-file-system-dmd-service)
  (file-system->dmd-service-name, mapped-device->dmd-service-name)
  (dependency->dmd-service-name, file-system-dmd-service)
  (mingetty-dmd-service, nscd-dmd-service, guix-dmd-service)
  (guix-publish-dmd-service, udev-dmd-service, gpm-dmd-service): Rename to...
  (%root-file-system-shepherd-service)
  (file-system->shepherd-service-name, mapped-device->shepherd-service-name)
  (dependency->shepherd-service-name, file-system-shepherd-service)
  (mingetty-shepherd-service, nscd-shepherd-service, guix-shepherd-service)
  (guix-publish-shepherd-service, udev-shepherd-service)
  (gpm-shepherd-service): ... this.
* gnu/services/databases.scm (postgresql-dmd-service): Rename to...
  (postgresql-shepherd-service): ... this.
* gnu/services/desktop.scm (upower-dmd-service, elogind-dmd-service):
  Rename to...
  (upower-shepherd-service, elogind-shepherd-service): ... this.
* gnu/services/dbus.scm (dbus-dmd-service): Rename to...
  (dbus-shepherd-service): ... this.
* gnu/services/lirc.scm (lirc-dmd-service): Rename to...
  (lirc-shepherd-service): ... this.
* gnu/services/mail.scm (dovecot-dmd-service): Rename to...
  (dovecot-shepherd-service): ... this.
* gnu/services/networking.scm (ntp-dmd-service, tor-dmd-service)
  (bitlbee-dmd-service, wicd-dmd-service, network-manager-dmd-service): Rename to...
  (dbus-shepherd-service): ... this.
* gnu/services/ssh.scm (lsh-dmd-service): Rename to...
  (lsh-shepherd-service): ... this.
* gnu/services/web.scm (nginx-dmd-service): Rename to...
  (nginx-shepherd-service): ... this.
* gnu/services/xorg.scm (slim-dmd-service): Rename to...
  (slim-shepherd-service): ... this.
* gnu/system.scm (essential-services): Use '%shepherd-root-service'.
* gnu/system/install.scm (cow-store-service-type): Adjust accordingly.
* guix/scripts/system.scm (dmd-service-node-label, dmd-service-node-type)
  (export-dmd-graph): Likewise.
* tests/guix-system.sh: Likewise.
* tests/services.scm ("dmd-service-back-edges"): Rename to...
  ("shepherd-service-back-edges"): Adjust accordingly.
* doc/guix.texi: Likewise.
* doc/images/service-graph.dot: Use 'shepherd' service name.

services: xorg: Use 'shepherd' instead of 'dmd'.

* gnu/services/xorg.scm (slim-configuration-dmd): Rename to...
  (slim-configuration-shepherd): ... this.
  (slim-shepherd-service): Adjust accordingly.
  (slim-service): Take 'shepherd' keyword argument.

services: shepherd: Rename shepherd configuration file.

* gnu/services/shepherd.scm (dmd-configuration-file): Rename to...
  (shepherd-configuration-file): ... this.  Use "shepherd.conf" name.
  (dmd-boot-gexp): Use it.

Rename (gnu services dmd) to (gnu services shepherd).

* gnu/services/dmd.scm: Rename to...
* gnu/services/shepherd.scm: ... this.
* gnu/system.scm: Use it.
* gnu/system/install.scm: Likewise.
* gnu/services/xorg.scm: Likewise.
* gnu/services/web.scm: Likewise.
* gnu/services/ssh.scm: Likewise.
* gnu/services/networking.scm: Likewise.
* gnu/services/mail.scm: Likewise.
* gnu/services/lirc.scm: Likewise.
* gnu/services/desktop.scm: Likewise.
* gnu/services/dbus.scm: Likewise.
* gnu/services/databases.scm: Likewise.
* gnu/services/base.scm: Likewise.
* gnu/services/avahi.scm: Likewise.
* guix/scripts/system.scm: Likewise.
* tests/services.scm: Likewise.
* tests/guix-system.sh: Likewise.
* doc/guix.texi (Shepherd Services): Adjust accordingly.
* gnu-system.am (GNU_SYSTEM_MODULES): Likewise.
* po/guix/POTFILES.in: Likewise.

Rename '/root/etc/dmd' directory and 'do-not-kill' file.

* gnu/services/base.scm (%do-not-kill-file): Rename to
  "/etc/shepherd/do-not-kill".
* gnu/build/linux-boot.scm (mount-root-file-system): Rename
  "/root/etc/dmd" to "/root/etc/shepherd".

Use 'shepherd' instead of 'dmd' as init system.

* gnu/services/dmd.scm (dmd-boot-gexp): Use binary from 'shepherd' package.
  (dmd-root-service-type): Use 'shepherd' package.
  (%default-modules): Use (shepherd service) module.
* gnu/services/base.scm (%root-file-system-dmd-service): Use
  'stop-logging' procedure to close shepherd log.

gnu: elogind: Use 'shepherd' input.

* gnu/packages/freedesktop.scm (elogind)[inputs]: Replace 'dmd' with
  'shepherd'.

gnu: emacs: Find packages in "~/.guix-profile".

* gnu/packages/emacs.scm (emacs)[inputs]: Add 'guix-src' input.
  [arguments]: Add 'install-site-start' phase.

Co-authored-by: Alex Kost <alezost@gmail.com>

gnu: guix: Update development snapshot to c3f29bc.

* gnu/packages/package-management.scm (guix-devel): Update to c3f29bc.

gnu: Add gtk-vnc.

* gnu/packages/gnome.scm (gtk-vnc): New variable.

Co-authored-by: 宋文武 <iyzsong@gmail.com>

gnu: ffmpeg: Add hardware acceleration, opengl support.

* gnu/packages/video.scm (ffmpeg)[inputs]: Add libvdpau, libx11, mesa.
[arguments]: Add configure-flags '--enable-opengl' '--enable-x11grab'.