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>

*: Linux emulation: add support for aarch64

PR:		256008
Submitted by:	Vincent Milum Jr (prior version)
Approved by:	emulation (maintainer timeout)

*/*: Remove redundant '-[0-9]*' from CONFLICTS

The conflict checks compare the patterns first against the package
names without version (as reported by "pkg query "%n"), then - if
there was no match - agsinst the full package names including the
version (as reported by "pkg query "%n-%v").

Many CONFLICTS definitions used patterns like "bash-[0-9]*" to filter
for the bash package in any version. But that pattern is functionally
identical with just "bash".

Approved by:	portmgr (blanket)

Remove # $FreeBSD$ from Makefiles.

Also install glxinfo32 on amd64 so information can be obtained about the
32-bit graphics stack.

Address some portlint warnings in the Linux infrastructure ports.

Eliminate LINUXNAME from port Makefiles.  This was just a helper variable
without special meaning outside port Makefiles but several developers have
copied it to new ports where it was then unused, apparently thinking that
it did have some special meaning.

Eliminate RPMVERSION from Linux ports and set DISTVERSIONSUFFIX instead.
This puts all version information together in the port Makefiles.

Update CentOS 7 ports to 7.6.1810.

This adds some new ports:
converters/linux-c7-fribidi required by x11-toolkits/linux-c7-pango.
graphics/linux-c7-libglvnd required by graphics/linux-c7-dri.
graphics/linux-c7-wayland required by graphics/linux-c7-dri.
print/linux-c7-freetype unbundled from emulators/linux_base-c7 because it
depends on graphics/linux-c7-png now.

Mesa OpenGL libraries in graphics/linux-c7-dri now support libglvnd (GL
Vendor-Neutral Dispatch library) which allows some applications to use
Mesa while others use Nvidia OpenGL.  The x11/nvidia-driver* ports have
been changed so versions above 390.42 now use CentOS libglvnd and no longer
install a bundled copy.

PR:		229431
Submitted by:	pkubaj (partly)

- Update WWW

Approved by:	portmgr blanket

Update Linux CentOS 7 ports to 7.4.1708.

Enable i386 support to Linux CentOS 7 ports.

PR:		216646

- Autodetect the installed linux_base port and use LINUX_DEFAULT only as
  a last resort.
- Construct a list of DISTFILES for every architecture (amd64, i386).
  Select one list for regular make and all lists for make makesum so linux
  ports can have one combined distinfo file.
- Set DIST_SUBDIR?=centos so there's only one copy of common distfiles.
- Use MASTER_SITES and DISTFILES groups so make fetch is a bit smarter.
- Regenerate all distinfo files.
- For linux_base-c6 (just like linux_base-c7 already does) turn bin, lib,
  lib64 and sbin into symbolic links to the same directory under usr.
  This fixes the problem where some programs/libraries exist under / on
  FreeBSD and /usr on Linux or vice versa and then depending on the order
  of search paths Linux programs may run/load FreeBSD programs/libraries
  and fail.
- Turn usr/share/icons into a symbolic link to LOCALBASE/share/icons so

Update Linux CentOS 7 ports to 7.3.1611.  While 7.2 had semi-official i386
packages there are no such packages for 7.3 yet so i386 support has been
marked IGNORE for now.

Change DIST_SUBDIR to just "centos" so distfiles that remain the same
between major versions don't have to be redownloaded.

Remove fmake hacks from linux.mk.

Submitted by:	Piotr Kubaj <pkubaj@anongoth.pl>

Remove NVIDIA option from Linux ports now that the nvidia-driver can be
installed later.

Fix pkg-plist.

Add Linux CentOS 7 infrastructure ports.

Mk/Uses/linux.mk changes:
- Add support for architecture neutral (noarch) distfiles.
- Add support for 64-bit only ports: set IGNORE on i386 and don't install
  32-bit compat libraries on amd64.

Submitted by:	Piotr Kubaj <pkubaj@anongoth.pl>
Differential Revision:	https://reviews.freebsd.org/D7886