Remove expired ports:

2019-12-31 accessibility/linux-c6-atk: Superseded by CentOS 7
2019-12-31 audio/exaile-devel: this port is older than audio/exaile
2019-12-31 audio/linux-c6-alsa-lib: Superseded by CentOS 7
2019-12-31 audio/linux-c6-alsa-plugins-oss: Superseded by CentOS 7
2019-12-31 audio/linux-c6-alsa-plugins-pulseaudio: Superseded by CentOS 7
2019-12-31 audio/linux-c6-alsa-utils: Superseded by CentOS 7
2019-12-31 audio/linux-c6-flac: Superseded by CentOS 7
2019-12-31 audio/linux-c6-libaudiofile: Superseded by CentOS 7
2019-12-31 audio/linux-c6-libogg: Superseded by CentOS 7
2019-12-31 audio/linux-c6-libsndfile: Superseded by CentOS 7
2019-12-31 audio/linux-c6-libvorbis: Superseded by CentOS 7
2019-12-31 audio/linux-c6-mikmod: Superseded by CentOS 7
2019-12-31 audio/linux-c6-nas-libs: Superseded by CentOS 7

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.

- 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

Make 64 bit Linux packages the default on amd64.

- In Uses/linux.mk use the loop variable directly when appending to
  *_DEPENDS.  Helper variables derived from the loop variable aren't
  expanded causing *_DEPENDS to be incorrect.
- Bump all ports with more than one value in USE_LINUX.

PR:		211645
Reported by:	jkim

- Replace Mk/bsd.linux-apps.mk and Mk/bsd.linux-rpm.mk with
  Mk/Uses/linux.mk.
- Replace USE_LINUX=yes with USES+=linux and USE_LINUX=(.*) with
  USES+=linux:\1 in all ports.
- Replace USE_LINUX_APPS with USE_LINUX in all ports.
- Use INSTALL_SCRIPT instead of INSTALL_PROGRAM to install scripts in some
  ports.
- When USE_LINUX_RPM is defined, simplify the way DISTFILES and EXTRACT_ONLY
  are defined.
- Remove BRANDELF_DIRS and BRANDELF_FILES handling.  In the very rare cases
  that it is still necessary ports can run ${BRANDELF} from post-patch.
- Remove AUTOMATIC_PLIST handling.  Only one port used it.
- Fix Linux MASTER_SITES.
- Replace OVERRIDE_LINUX_BASE_PORT and OVERRIDE_LINUX_NONBASE_PORTS with
  default versions framework.

Generate loaders.cache on package installation.

- Move some dependencies from linux-c6-gtk2 to linux-c6-gdk-pixbuf2.
- Remove pixman distfiles from linux-c6-gtk2.  Nothing there needs it.

Use LINUX_REPO_ARCH instead of LINUX_RPM_ARCH when setting DISTINFO_FILE
and PLIST for Linux ports.  LINUX_RPM_ARCH is the CPU targetted by a
package and LINUX_REPO_ARCH is like our ARCH which is more suitable.  This
only affects Centos 6 ports because they are the only ones where
LINUX_REPO_ARCH != LINUX_RPM_ARCH.

Update Linux ports to Centos 6.8.

PR:		210373
Submitted by:	Piotr Kubaj <pkubaj@anongoth.pl>
Differential Revision:	https://reviews.freebsd.org/D6891

CentOS ports: for c6_64, install 32bit libraries alongside

PR:		206943
Submitted by:	xmj

Welcome Centos 6.7

- Upgrade all linux-c6- to CentOS 6.7
- Cleanups

PR:                     205846
Submitted by:           xmj
In Collaboration with:  allanjude, netchild, xmj
Exp-run:                antoine
Sponsored by:           Perceivon Hosting Inc.
Differential Revision:  D3428

We'd like to thanks for all the feedback and comments.

Re-commit of
64 bit linuxulator support (not activated by default):
 - most of the work was done by Alan Jude
 - all errors are mine
 - 64bit (may) have rough edges
 - I validated
    * that the 32bit part doesn't has deinstall regressions (incl. EXP runs by
      antoine)
    * 29 of 72 64bit ports ports don't have deinstall leftovers (more validation
      later, when I dare to activate the 64bit linuxulator in the kernel)
 - the infrastructure part looks mature enough to let more test-bunnies get
   some experience with the new 64 bit parts
 - to use it you shall have no linux ports installed and have to specify
   (on your own risk) the following in make.conf before installing the ports:
   OVERRIDE_LINUX_BASE_PORT=c6_64

Unbreak INDEX, reverting r392921

With hat:	portmgr

64 bit linuxulator support (not activated by default):
 - most of the work was done by Alan Jude
 - all errors are mine
 - 64bit (may) have rough edges
 - I validated
    * that the 32bit part doesn't has deinstall regressions
    * 29 of 72 64bit ports ports don't have deinstall leftovers (more validation
      later, when I dare to activate the 64bit linuxulator in the kernel)
 - the infrastructure part looks mature enough to let more test-bunnies get
   some experience with it
 - to use it you shall have no linux ports installed and have to specify
   (on your own risk) the following in make.conf before installing the ports:
   OVERRIDE_LINUX_BASE_PORT=c6_64
   OVERRIDE_LINUX_NONBASE_PORTS=c6_64

graphics/linux-c6-gdk-pixbuf: rename to -pixbuf2

- Rename gdk-pixbuf to linux-c6-gdk-pixbuf2 to properly distinguish between
  linux- gdk-pixbuf 1 and 2.
- Change consumers dependencies to match.

PR: 		195120, 195121
Differential Revision:	https://reviews.freebsd.org/D1192
Submitted by:	Jan Beich <jbeich@vfemail.net>
Reviewed by:	rene (emulation)
Approved by:	swills (mentor)
Approved by:	portmgr (swills)