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.

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@

Update to 0.6.0

- Bump PORTREVISION for dependent ports

Changes:	https://chromium.googlesource.com/webm/libwebp/+/master/NEWS

- Update to 0.5.0
- Bump PORTREVISION for graphics/webp shlib change

Changes:	https://chromium.googlesource.com/webm/libwebp/+/master/NEWS

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 Gstreamer framework to 1.4.5.

Fix 41 gstreamer1-plugins- ports that were creating empty packages

With hat:	portmgr

Big Gstreamer update:

Update gstreamer, gstreamer-plugins, -good, -bad and -ugly ports to 1.4.4.
Update gstreamer1-plugins-gnonlin to 1.4.0.
Update py-gstreamer1 and py3-gstreamer1 to 1.4.0.

Add multimedia/gstreamer1-editing-services. GES is a high-level library
for facilitating the creation of audio/video non-linear editors.

Add pulseaudio plugin now that pulseaudio is updated and add the gl plugin.

Drop :keepla from USES=libtool.
Drop @dirrm[try] from plists and drop gnomehier from USE_GNOME
Switch to optionhelpers in multimedia/gstreamer1.

PR:		194922 (merged with my own WIP)
Submitted by:	olivierd

- Update to 0.4.0
- Add LICENSE
- Sort LIB_DEPENDS
- Use USES=libtool
- Do not silence installation message
- Bump PORTREVISION for graphics/webp shlib change

Changes:	https://chromium.googlesource.com/webm/libwebp/+/master/NEWS

Update gstreamer 1.0 ports to version 1.2.4.

When linking a library libA with a library libB using libtool, if libB.la
exists, libtool will add all libraries libB.la refers to (dependency_libs
field) to the linker command line and store them in the dependency_libs
field of libA.la.  So everything that subsequently links with libA will also
link to these extra libraries.  This causes too much overlinking.

This commit modifies Mk/Uses/libtool.mk so it empties the dependency_libs
field in .la libraries during staging.  However, because .la libraries have
very limited use when dependency_libs is empty it makes sense to completely
remove them during staging.

So with this commit USES=libtool is modified to remove .la libraries and a
new form (USES=libtool:keepla) is introduced in case they need to be kept
(dependency_libs is still emptied).

Update to 1.2.1.

Retire celt plugin, it was removed in flavor for the opus plugin.
Add new webp, kate and openjpeg plugin.