multimedia/avidemux-*: Bump PORTREVISION for audio/libmad shlib change (followup
of 2bbe718e827ec0156d321762f1af63cb80edacd0)

PR:		265182
Reported by:	<rkoberman@gmail.com>

multimedia/avidemux: update to 2.7.8

Changelog:
	http://avidemux.sourceforge.net/news.html#2021-03-09

- Cleanup of option handling is planned for the near future.

PR:		258720

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

graphics/mesa-libs: Bump reverse deps for libglvnd

Per discussion with bapt on helping pkg handle the changing of these
deps and avoiding impossible upgrade senarios.

PR:		246767
Reviewed by:	manu, bapt
Approved by:	x11
Differential Revision:	https://reviews.freebsd.org/D30824

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

Remove # $FreeBSD$ from Makefiles.

multimedia/avidemux: update to 2.7.4 and readd Qt gui port

- multimedia/avidemux-qt5 repo copied from multimedia/avidemux-qt4
- The port as a whole is in need of a little modernization

PR:		242634
Submitted by:	Lars Herschke <lhersch@dssgmbh.de>,tcberner
Tested by:	rkoberman@gmail.com
Reported by:	VVD <vvd@unislabs.com>

Bump PORTREVISION for ports depending on the canonical version of GCC
as defined in Mk/bsd.default-versions.mk which has moved from GCC 8.3
to GCC 9.1 under most circumstances now after revision 507371.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, everything INDEX-11 shows with a dependency on lang/gcc9 now.

PR:		238330

Bump PORTREVISION for ports depending on the canonical version of GCC
defined via Mk/bsd.default-versions.mk which has moved from GCC 7.4 t
GCC 8.2 under most circumstances.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, as a double check, everything INDEX-11 showed depending on lang/gcc7.

PR:		231590

Bump PORTREVISION after r464084.
While here, add a patch for multimedia/avidemux-plugins to fix the build with
gcc7.

Reviewed by:	gerald

Move PORTREVISION from multimedia/avidemux/Makefile.common into the
three slave ports multimedia/avidemux-cli, multimedia/avidemux-plugins,
and multimedia/avidemux-qt4.  Ensure they are properly set there
after revision 464084.

That way any sweeping changes (using Tools/scripts/bump-revision.sh
or similar in particular) have a chance of working or at least flagging
a potential issue.

PR:		226533

Bump PORTREVISIONs of all users of math/mpc that we just updated to
version 1.1.0 (via revision 464079).

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

With hat:	portmgr
Sponsored by:	Absolight

Move multimedia/avidemux26-* to multimedia/avidemux-*