Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

graphics/xcftools: Add CPE information

Approved by:	portmgr (blanket)

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

Remove # $FreeBSD$ from Makefiles.

graphics/xcftools: Spell TESTS_BUILD_DEPENDS correctly

Change cmake default behaviour to outsource.

Ports that build out of source now simply can use "USES=cmake"
instead of "USES=cmake:outsource". Ports that fail to build
out of source now need to specify "USES=cmake:insource".

I tried to only set insource where explictely needed.

PR:		232038
Exp-run by:	antoine

Make ninja opt-out in cmake.mk

Using ninja instead of make (1) can lead to significant speed ups while
building.
Therefore switch from having the ninja generator opt-in to having it opt-out.

Previously cmake-ports that wanted to use ninja could set
    CMAKE_NINJA=yes
now, ports that do not work with ninja can set
    cmake:<existing args>,noninja
Note, that needing this should be an exception and most often points to a broken
cmake of the port.

The ports using cmake were modified
* removed USES=gmake, if ninja is used
* removed MAKE_ARGS, if ninja is used
* added the cmake-argument noninja if necessary

PR:		219629
PR:		213331
Exp-run by:	antoine
Reviewed by:	rakuco
Differential Revision:	https://reviews.freebsd.org/D10748

Remove ${PORTSDIR}/ from dependencies, categories d, e, f, and g.

With hat:	portmgr
Sponsored by:	Absolight

Update ports in the games category to not use GH_COMMIT.

With minor cleanups to make things simpler.

With hat:	portmgr
Sponsored by:	Absolight

Update USE_GITHUB so it does not require GH_COMMIT.

Using this new scheme allows only setting the _tag_ or _commit hash_ in
GH_TAGNAME and not having to know the hash for a tag.  This scheme will
download a tarball that has a different checksum than before due to a changed
directory name for extraction.

The following MASTER_SITES are provided to retain the old checksum and
directory structure (that require GH_COMMIT):
  GH -> GHL
  GITHUB -> GITHUB_LEGACY

Differential Revision:	https://reviews.freebsd.org/D748
Submitted by:	amdmi3
Reviewed by:	mat, swills, antoine, bdrewery
With hat:	portmgr

Bump portrevision after png update

Properly support png 1.5

Add new port graphics/xcftools

PR:		179116
Submitted by:	Kalten (gmx.at)

Xcftools is a set of fast command-line tools for extracting information
from the Gimp's native file format XCF. The tools are designed to allow
efficient use of layered XCF files as sources in a build system that use
'make' and similar tools to manage automatic processing of the graphics.
These tools work independently of the Gimp engine and do not require the
Gimp to even be installed.