Log message:
x11/compton: Switch upstream to the same fork as Arch Linux, update to 4.0.

Take maintainership.

Notable changes (no changelog is available):

* [pkgsrc] Some dependencies made into options.
* The paint-on-overlay configuration option was removed, and is now enabled
by default.
* The xrender-sync and xrender-sync-fence options were removed.
* Moved most of the X functions (XShape, XComposite, Xrender, Xinerama, etc.)
to xcb.
* Moved from server side region (Xfixes) to client side (pixman).
* Use libev for I/O and timeout events.

Log message:
MAKEFLAGS -> MAKE_FLAGS (pkgsrc guide 22.1)

Log message:
Add SHA512 digests for distfiles for x11 category

Problems found locating distfiles:
        Package modular-xorg-server: missing distfile xorg-server-1.17.4.tar.bz2
        Package py-qt4: missing distfile PyQt-mac-gpl-4.11.1.tar.gz
        Package xservers: missing distfile xservers-3.3.6.5.tar.bz2
        Package xview-clients: missing distfile xview3.2p1-X11R6.tar.gz
        Package xview-lib: missing distfile xview3.2p1-X11R6.tar.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
Needs pkg-config.

Log message:
Import compton-20150920 as x11/compton.

Compton is a compositor for X, and a fork of xcompmgr-dana.

Changes from xcompmgr:

  OpenGL backend (--backend glx), in addition to the old X Render backend.
  Inactive window transparency (-i) / dimming (--inactive-dim).
  Titlebar/frame transparency (-e).
  Menu transparency (-m, thanks to Dana).
  shadows are now enabled for argb windows, e.g. terminals with transparency
  removed serverside shadows (and simple compositing) to clean the code,
    the only option that remains is clientside shadows
  configuration files (see the man page for more details)
  colored shadows (--shadow-[red/green/blue])
  a new fade system
  VSync support (not always working)
  Blur of background of transparent windows, window color inversion (bad in
    performance)
  Some more options...