cleanup: Remove expired ports:

2022-06-30 multimedia/mpeg2codec: Obsolete, please consider using
multimedia/ffmpeg
2022-06-30 multimedia/livestreamer: Abandoned upstream, please consider using
www/yt-dlp or multimedia/streamlink
2022-06-30 net/kissd: Obsolete, target hardware was released 19 years ago
2022-06-30 www/gecko-mediaplayer: Uses incompatible plugin interface NPAPI
2022-06-30 multimedia/snappy: Deprecated upstream, please consider
multimedia/mpv or multimedia/vlc
2022-06-30 audio/exaile: Requires py-bsddb3 which requires upstream EOLd db5
2022-06-30 multimedia/gnome-twitch: Unmaintained, please consider using
www/yt-dlp or multimedia/streamlink
2022-06-30 multimedia/clive: Last release in 2012, please consider using
www/yt-dlp or multimedia/streamlink
2022-06-30 multimedia/imagination: Obsolete, majority of DVD players made in the
last 15+ years have been able to do image slideshows
2022-06-30 multimedia/m2tstoavi: Marked obsolete by upstream in 2010, please
consider using multimedia/ffmpeg or multimedia/handbrake
2022-06-30 multimedia/mps-youtube: Abandoned upstream
2022-06-30 multimedia/umph: Last release in 2012 and abandoned upstream, please
consider using www/yt-dlp
2022-06-30 multimedia/quvi09: Deprecated upstream, please consider using
www/yt-dlp or multimedia/streamlink

framework: convert bsd.gstreamer.mk to Uses/gstreamer.mk

- convert bsd.gstreamer.mk to Uses/gstreamer.mk
- convert ports tree to make use of USES=gstreamer
- remove duplicate dependency lines from the tree

Differential Revision: https://reviews.freebsd.org/D35097

multimedia/snappy: Deprecate and expiration date to 2022-06-30

Deprecated upstream

Reference: https://gitlab.gnome.org/Archive/snappy

PR:		263523
Approved by:	gnome (nc)

INSTALLS_ICONS: retire the macro and rework the related dependencies

While here, make sure gtk-update-icon-cache is only on run dependency
where added as a dependency
Enforce gtk3 to depend on gtk-update-icon-cache (previously it was
inheriting the dependency)

Remove # $FreeBSD$ from Makefiles.

multimedia: Add missing USES={gl,gnome,sdl,xorg}

Remove libintl.so.9 compatibility link that was added in r374303 to
prevent massive PORTREVISION bumps.  Bump dependent ports that have not
been bumped since.

- Fix trailing whitespace in pkg-descrs, categories [g-n]*

Approved by:	portmgr blanket

Remove ${PORTSDIR}/ from dependencies, categories m, n, o, and p.

With hat:	portmgr
Sponsored by:	Absolight

The FreeBSD GNOME team proudly presents GNOME 3.14 and Cinnamon 2.2.
Gnome 3.14.1 and Cinnamon 2.2.16 are supported on FreeBSD 9.3-RELEASE and up.

This commit removes the old GNOME 2 desktop, bindings and some ports that
can't be compiled. A few ports where updated to more recent versions to
allow them to compile with this update.

Apart from updating ports to newer versions

GDM is more integrated with gnome-shell now, and handles several things for
the GNOME desktop such as screen locking. If you want to use GNOME 3 via
startx, you will have to add your own lock screen/screensaver. For example
xscreensaver
can be used for sessions started without GDM.

Shell Extensions can be installed via https://extensions.gnome.org/ , we have