Remove expired ports:
2016-05-15 lang/gcc-aux: Use newer lang/gcc5-aux or lang/gcc6-aux compilers
instead
2016-05-16 audio/deadbeef-mpris-plugin: Abandonware; use
`audio/deadbeef-mpris2-plugin' instead

Remove ${PORTSDIR}/ from dependencies, Mk and categories a, b, and c.

With hat:	portmgr
Sponsored by:	Absolight

This port no longer works with recent versions of glib and/or DeaDBeeF: the
player crashes upon loading plugin.  There are some patches floating on the
Internet that attempt to fix this, but they only partially address the bug;
plugin still crashes as soon as it calls g_dbus_connection_emit_signal().

Point users to somewhat limited, but working `audio/deadbeef-mpris2-plugin'
port instead, and deprecate this one (expiring in six months).

Reclaim maintainership of ports that I still use regularly, but decided to
relinquish at some point to allow contributions coming more easily (not to
impose hard lock).  These days, there is no reason to yield maintainership
with the more lax rules and general consensus that casual changes do not
necessarily require explicit approval from maintainer prior to commit.

On the other hand, unmaintained ports can give (arguably false) impression
of being unwanted and one step above deprecation, yet these ports are not.

Inspired by:	marino

Cleanup plist

- Switch to USES=libtool, drop .la files
- Strip libraries

Stage support

Add NO_STAGE all over the place in preparation for the staging support (cat:
audio)

Add an explicit dependency on pkgconf

Unbreak after glib20 update.

* Update the glib to 2.34.3 and gtk20 to 2.24.17 and gtk30 to 3.6.4 which
  are the latest stable releases.
* Update vala to the newest stable release 0.18.1, also update a few ports
  in the gtk/gnome stack.
* The c++ bindings ports for glib, atk, gconf, etc, have now USE_GNOME toggles.
* Remove pkg-config run depends from glib20 and freetype2. This doesn't
  eliminate pkg-config run dependency completely, a second phase is needed
  and is planned.
* Support for .:run. and .:build. for USE_GNOME components was added.
  Currently only libxml2 and libxslt support this mechanism.
* Updates of the telepathy stack and empathy.
* Trim makefile headers, convert ports to new options, trim off library
  versions for some ports.
* Fix other ports so they build with the new glib version.

Thanks to miwi and crees for helping out with some exp-runs.
Approved by:	portmgr (miwi & bapt)
Obtained from:	gnome team repo

- Update osd-lyrics to version 0.4.3
- Release these two related ports to the wild

- update png to 1.5.10

Update to version 2.1.3.

- Bump PORTREVISION to chase the update of multimedia/libvpx

Add missing comma before conjunction word.

Pointy hat to:  danfe
Feature safe:   yes

A port of MPRIS (Media Player Remote Interfacing Specification) plugin for
DeaDBeeF music player.

Feature safe:   yes