multimedia/gstreamer1: Update to 1.24.8

Mk/Uses/gstreamer.mk:
- Sort, fix whitespace issues and typos
- Promote several common variables to improve maintainer QOL
*   There's now no need to set manually set PORTVERSION nor
    SOVERSION in several Makefiles
*   This will help to prevent not updating some components
*   A note has been added, however, to remind maintainers
    to remake distinfo for certain ports
- Improve documentation

multimedia/gstreamer1-plugins-webrtc:
- New port split from multimedia/gstreamer1-plugins-bad
- multimedia/gstreamer1-plugins-rust has been updated

Update gstreamer1 to upstream release 1.20.3

PR:		261585
Reviewed by:	riggs,jbeich,tcberner

Differential Revision:	https://reviews.freebsd.org/D36850

textproc/libxml2: bump all LIB_DEPENDS consumers

This is a separate commit to facilitate easier cherry-picking for
quarterly.

PR: 262853, 262940, 262877, 263126
Approved by: fluffy (mentor)

textproc/libxml2: bump all dependencies

This should make sure that all dependent ports will pick
up the new version commited with a13ec21cd733f67a9fc0dc00ab45268bdc236246

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

multimedia/openh264: update to 2.1.1

Changes:	https://github.com/cisco/openh264/releases/tag/v2.1.1
ABI:		https://abi-laboratory.pro/tracker/timeline/openh264/
Reported by:	GitHub (watch releases)

Update gstreamer1 to 1.16.2.

- The spc plugin was removed inflavor for the gsm plugin.
- Added in tree qt plugin.

Changelog: https://gstreamer.freedesktop.org/releases/1.16/#1.16.2

Update net-im/fractal to 4.2.2 to support GStreamer 1.16 (approved by
maintainer)

Thanks to antoine@ for the exp-run.

PR:		239386

multimedia/openh264: update to 2.0.0

- Add symlinks for cliqz and thunderbird

Changes:	https://github.com/cisco/openh264/releases/tag/v2.0.0
ABI:		https://abi-laboratory.pro/tracker/timeline/openh264/
Reported by:	GitHub (watch releases)

Update GStreamer1 ports to 1.12.2.

Rework the adding of dependancies in Mk/bsd.gstreamer.mk.
Previous when using USE_GSTREAMER[1] it would just add the request modules to
BUILD/RUN_DEPENDS. This caused the qa script to complain because the old code
didn't implicit depend on the gstreamer1 and gstreamer1-plugins[-bad] ports for
the libraries they carried, even if they where present via the plugins! The new
code adds implicit depends on these ports so USE_GSTREAMER[1] using ports have
all the libraries included.

* The mad mp3 plugin was removed, mpg123 plugin also provides mp3 decoding.
Switch over ports that used the gstreamer1 mad plugin.
* gtksink plugin renamed -> gtk
* Hook up the sndio plugin into the framework
* Add some indirect dependacies where needed
* Reorder the plugin list in bsd.gstreamer.mk so only one plugin per line. When
changing plugins it doesn't result in multiple lines being changed.
* Remove mentions in bsd.gstreamer.mk of plugins mentions that where removed.
* Depend on libunwind on i386/amd64, GStreamer links to it if it is present.

PR:		220753
Exp-run by:	antoine@

multimedia/openh264: update to 1.7.0

Changes:	https://github.com/cisco/openh264/releases/tag/v1.6.0
Changes:	https://github.com/cisco/openh264/releases/tag/v1.7.0
ABI:		https://abi-laboratory.pro/tracker/timeline/openh264/

multimedia/openh264: back out r418381 (try#2)

As every consumer was broken except for net/pjsip which isn't actually
linking against openh264 there's no need to bump PORTREVISION.

multimedia/openh264: update to 1.6.0

API/ABI has changed, so bump PORTREVISION in consumers. Some of those
are marked BROKEN that may need a fix similar to libav.

https://git.libav.org/?p=libav.git;a=commitdiff;h=d825b1a53065

Changes:	https://github.com/cisco/openh264/releases/tag/v1.6.0

multimedia/openh264: oops, back out r418381

Every consumer was broken except for net/pjsip which isn't actually
building *against* openh264.

multimedia/openh264: update to 1.6.0

API/ABI has changed, so bump PORTREVISION in consumers. Some of those
are marked BROKEN that may need a fix similar to libav.

https://git.libav.org/?p=libav.git;a=commitdiff;h=d825b1a53065

Changes:	https://github.com/cisco/openh264/releases/tag/v1.6.0

Update GStreamer1 to 1.6.2.
Update GStreamer1-vaapi to 0.7.0.

* Spell GStreamer consistently. [1]
* Fix typo in py3kplist in py3-gstreamer1 [1]
* Improve plugins COMMENTS (more improvements welcome)
* Actually include the gstreamer1-libav update this time.

PR:		204204 [1] (based on)
Submitted by:	olivierd@ [1]

Update gstreamer1 ports to 1.6.0.

* gstreamer1-libav now uses ffmpeg from ports.
* New ports:
  * gstreamer1-validate: Tools to detect if elements are not behaving
    as expected, mainly aimed at developers, or advanced debugging.
  * gstreamer1-rtsp-server: Base foundation for building a rtsp
    server ontop of GStreamer
 * Bunch of new plugins like: mpg123, rsvg, libde265, openh264, x265 and dtls.

Release announcement:
 
http://lists.freedesktop.org/archives/gstreamer-announce/2015-September/000357.html

Obtained from:	gnome devel repo