framework: Add new USES 'magick' for graphics/ImageMagick*

A new USES has been added to depend on ImageMagick.

	USES=magick

adds a LIB_DEPENDS on graphics/ImageMagick${IMAGEMAGICK_DEFAULT}.

If a specific version is required, use for example

	USES=magick:6        resp.     USES=magick:7

If only a build, run or test is required, use for example

	USES=magick:build    resp.     USES=magick:6,build,test

Remove # $FreeBSD$ from Makefiles.

Update ImageMagick to 6.9.10.14 [1]

* Add PKGNAMESUFFIX and rename the directory. This was done to show
  that IM6 is not the "main" version. But still fully supported by upstream.
* Convert a number of options to optionhelpers.
* Add option for ISO/IEC 23008-12:2017 HEIF suport
* Add comment to pkg-descr explaining IM6's "legacy" tag.
* Add comment to the patch-config_policy.xml file why it still needed.

Please note that IM7 is not a drop in replacement due to library API and
command arguments changes. And as a result ports need to decide for themself
which version to use.

Chase these changes in all the ports that using IM6.

PR:		225102 (based on, only the version update) [1]
Submitted by:	Pascal Christen <pascal.christen@hostpoint.ch>

Remove ${PORTSDIR}/ from dependencies, categories v, w, x, y, and z.

With hat:	portmgr
Sponsored by:	Absolight

MASTER_SITES cleanup.

- Replace ${MASTER_SITE_FOO} with FOO.
- Merge MASTER_SITE_SUBDIR into MASTER_SITES when possible. (This means 99.9%
  of the time.)
- Remove occurrences of MASTER_SITE_LOCAL when no subdirectory was present and
  no hint of what it should be was present.
- Fix some logic.
- And generally, make things more simple and easy to understand.

While there, add magic values to the FESTIVAL, GENTOO, GIMP, GNUPG, QT and
SAMBA macros.

Also, replace some EXTRACT_SUFX occurences with USES=tar:*.

Checked by:	make fetch-urlall-list
With hat:	portmgr
Sponsored by:	Absolight

Remove Author from pkg-descr and white space fixes

- Drop @dirrm* from pkg-plists

Approved by:	portmgr blanket

- add stage support

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

Rectify USE_TEX to support both of teTeX and TeXLive.

TEX_DEFAULT:
	A knob to choose teTeX or TeXLive.  One can specify in /etc/make.conf.

USE_TEX:
	A knob for port developers.  Valid keywords are listed in
	bsd.tex.mk.

Remove *_DEPENDS from ports which depend on teTeX and add USE_TEX=tetex
instead to make migration to TeXLive easier.

Pass maintainership to submitter

PR:		ports/177030
Submitted by:	Chris Petrik <c.petrik.sosa@gmail.com>

Reassign skv@ ports to the heap

Feature safe:	yes

graphics/ImageMagick can change package name via PKGNAMESUFFIX.
We should not rely on this.

Reported by:    Jarrod Sayers <jarrod at downtools.com.au>
Pointy hat:     az@

- Remove SITE_PERL from *_DEPENDS

Approved by: portmgr@ (bapt@)

- Get Rid MD5 support

Add twiki-MathModePlugin , include LaTeX formatted math in your TWiki
pages.