*/*: Properly depend on Subversion LTS or latest with WITH_SUBVERSION_VER

When LTS version of Subversion is set in make.conf (WITH_SUBVERSION_VER)
depending ports will still depend on latest version (devel/subversion)
instead of LTS one (devel/subversion-lts). This will cause dependency
conflicts when packages are distributed with Poudriere, namely pkg(8)
will report them and fail to install.
Make all affected ports properly depend on the right port based on the
value set in WITH_SUBVERSION_VER.

Approved by:	jrm (mentor), otis (mentor), lev (maintainer timeout)
Differential Revision:	https://reviews.freebsd.org/D43864

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: remove 'Created by' lines

A big Thank You to the original contributors of these ports:

  *  "Waitman Gobble" <uzimac@da3m0n8t3r.com>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Abel Chow <ozsanh45vds001@sneakemail.com>
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Ade Lovett <ade@FreeBSD.org>
  *  Ade Lovett <ade@lovett.com>
  *  Akinori MUSHA aka knu <knu@idaemons.org>
  *  Aldis Berjoza <aldis@bsdroot.lv>
  *  Alex Hayward <xelah@xelah.com>
  *  Alex Ivasyuv <siegerstein@pochta.ru>
  *  Alex Samorukov <samm@os2.kiev.ua>

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

Remove # $FreeBSD$ from Makefiles.

Add USES=xorg USES=gl, ports categories g

Add USES=xorg and USES=gl to ports in categories starting with 'g'.
While here, try to sprinkle other USES (mostly gnome and sdl) as needed.

Revision bump of all ports with USE_GL after consolidation of mesa-libs

Approved by:	swills (mentor)
Differential Revision:	https://reviews.freebsd.org/D10845

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

With hat:	portmgr
Sponsored by:	Absolight

- Strip libraries
- Add LICENSE_FILE

- Use ${WRKSRC}, not / as a temp directory (fixes install from non-root)

- Resurrect, unbreak, stagify, modernize Makefile
- Define LICENSE (GPLv2), remove -O3 from CFLAGS
- Rename (regenerate) one ::-containing patch file
- Contract MASTER_SITES, update pkg-plist and pkg-descr

Remove expired ports:
graphics/yukon: depends on graphics/seom
2013-12-22 graphics/seom: Broken for more than 6 month

Fix NO_STAGE attribution

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

- Remove MAKE_JOBS_SAFE variable

Approved by:	portmgr (bdrewery)

Style: tab -> space.

Most contributors copy an existing port when writing their own so reduce the
number of bad examples in the tree.

Remove references to unsupported FreeBSD versions. Mostly of the form:
.if ${OSVERSION} < 700000

-remove MD5

Remove bms from the pkg-descr's of ports he no longer maintains.

Drop maintainership for these ports.

Regrettably, I have no free time for the foreseeable future which
I can commit directly to these aspects of FreeBSD work, due to
a demanding new role elsewhere.

I am able to review patches from time to time, but regrettably cannot
be directly involved in engineering work beyond this w/o it being
directly involved in day-to-day effort.

Thank you for your understanding.

yukon is an application to capture video of OpenGL animation using seom