gnu: libxscrnsaver: Propagate input scrnsaverproto.

* gnu/packages/xorg.scm (libxscrnsaver): Propagate input scrnsaverproto,
    since scrnsaver.h from libxscrnsaver includes saver.h from scrnsaverproto.

Use #:prefix instead of #:renamer with 'symbol-prefix-proc'.

* gnu/packages/abiword.scm, gnu/packages/admin.scm, gnu/packages/aidc.scm,
  gnu/packages/backup.scm, gnu/packages/bittorrent.scm,
  gnu/packages/boost.scm, gnu/packages/compression.scm,
  gnu/packages/cryptsetup.scm, gnu/packages/curl.scm,
  gnu/packages/cyrus-sasl.scm, gnu/packages/dc.scm, gnu/packages/emacs.scm,
  gnu/packages/fonts.scm, gnu/packages/fontutils.scm, gnu/packages/geeqie.scm,
  gnu/packages/ghostscript.scm, gnu/packages/gimp.scm,
  gnu/packages/gkrellm.scm, gnu/packages/gl.scm, gnu/packages/glib.scm,
  gnu/packages/gnome.scm, gnu/packages/gnunet.scm, gnu/packages/gnupg.scm,
  gnu/packages/gnutls.scm, gnu/packages/gnuzilla.scm, gnu/packages/gsasl.scm,
  gnu/packages/gtk.scm, gnu/packages/gv.scm, gnu/packages/image.scm,
  gnu/packages/indent.scm, gnu/packages/inkscape.scm,
  gnu/packages/lesstif.scm, gnu/packages/links.scm, gnu/packages/lisp.scm,
  gnu/packages/lsh.scm, gnu/packages/lsof.scm, gnu/packages/maths.scm,
  gnu/packages/mp3.scm, gnu/packages/openssl.scm, gnu/packages/ots.scm,
  gnu/packages/pciutils.scm, gnu/packages/pcre.scm, gnu/packages/pdf.scm,
  gnu/packages/pulseaudio.scm, gnu/packages/python.scm, gnu/packages/slim.scm,
  gnu/packages/ssh.scm, gnu/packages/texlive.scm, gnu/packages/vim.scm,
  gnu/packages/vpn.scm, gnu/packages/web.scm, gnu/packages/wv.scm,
  gnu/packages/xiph.scm, gnu/packages/xml.scm, gnu/packages/xorg.scm,
  gnu/packages/yasm.scm, gnu/packages/zip.scm,
  guix/build/cmake-build-system.scm, guix/build/perl-build-system.scm,
  guix/build/python-build-system.scm, guix/download.scm: Replaces uses of
  #:renamer and 'symbol-prefix-proc' with #:prefix.

gnu: xf86-input-synaptics: Allow building with libc 2.20.

* gnu/packages/patches/xf86-input-synaptics-glibc-2.20.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/xorg.scm (xf86-input-synaptics): Use it.  Improve
  synopsis and description.

gnu: xorg: Remove xf86-input-vmmouse.

* gnu/packages/xorg.scm (xf86-input-vmmouse): Remove.  This driver
  implement the mouse protocol of a proprietary emulator.
* gnu/services/xorg.scm (xorg-start-command): Remove reference.

Merge branch 'master' into core-updates

Conflicts:
	gnu-system.am

gnu: Adjust synopses as recommended by 'guix lint'.

Remove leading articles and trailing periods in package synopses.

Merge branch 'master' into core-updates

gnu: xorg: Add presentproto.

* gnu/packages/xorg.scm (presentproto): New variable.

gnu: xorg: Add dri3proto.

* gnu/packages/xorg.scm (dri3proto): New variable.

gnu: xf86-input-evdev: Add required input udev.

* gnu/packages/xorg.scm (xf86-input-evdev): Add input udev.

gnu: setxkbmap: Use xkeyboard-config as default config root.

* gnu/packages/xorg.scm (setxkbmap): Add 'xkeyboard-config' as an input.
  Pass --with-xkb-config-root to configure.

gnu: Consolidate libjpeg, libpng, and libtiff into one module.

* gnu/packages/image.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add image.scm and remove libjpeg.scm,
  libpng.scm, and libtiff.scm.
* gnu/packages/libjpeg.scm, gnu/packages/libpng.scm, gnu/packages/libtiff.scm:
  Delete files.
* gnu/packages/emacs.scm gnu/packages/games.scm, gnu/packages/gd.scm,
  gnu/packages/geeqie.scm, gnu/packages/ghostscript.scm,
  gnu/packages/gimp.scm, gnu/packages/gnome.scm, gnu/packages/gnunet.scm,
  gnu/packages/gnustep.scm, gnu/packages/gnuzilla.scm,
  gnu/packages/graphviz.scm, gnu/packages/gtk.scm,
  gnu/packages/imagemagick.scm, gnu/packages/inkscape.scm,
  gnu/packages/netpbm.scm, gnu/packages/pdf.scm, gnu/packages/plotutils.scm,
  gnu/packages/qemu.scm, gnu/packages/qt.scm, gnu/packages/scheme.scm,
  gnu/packages/sdl.scm, gnu/packages/slim.scm, gnu/packages/tcl.scm,
  gnu/packages/texlive.scm, gnu/packages/video.scm, gnu/packages/xiph.scm,
  gnu/packages/xorg.scm: Use (gnu packages image) module.

Merge branch 'master' into core-updates

gnu: xterm: Upgrade to 304.

* gnu/packages/xorg.scm (xterm): Upgrade to 304.  Switch to a
  version-specific URL.

gnu: libsm: Propagate input libice.

* gnu/packages/xorg.scm (libsm): Propagate input libice.

gnu: xorg: libxxf86dga: Propagate input xf86dgaproto.

* gnu/packages/xorg.scm (libxxf86dga): Propagate input xf86dgaproto.

gnu: Add perl-x11-protocol

* gnu/packages/xorg.scm (perl-x11-protocol): New variable

Merge branch 'core-updates'

Merge branch 'master' into core-updates

gnu: util-macros: Install .pc file in lib/pkgconfig; remove INSTALL file.

* gnu/packages/xorg.scm (util-macros): Substitute "$(libdir)/pkgconfig"
  for "$(datadir)/pkgconfig" in Makefile.in.  After install, remove
  share/util-macros/INSTALL and share/util-macros.