Merge Linux ncurses-base into linux_base.  It's needed by ncurses-libs.

- 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.

- 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.

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.

Change all occurrences of xmj@chaot.net to johannes@perceivon.net as the owner
requested.

This only affects "Created by" lines with one exception: devel/uclcmd. There the
maintainer is changed. This was overlooked in r416918.

Approved by: junovitch (mentor)

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.

- Update maintainer mail address
- Update/Remove MASTER_SITE

PR:		204755
Submitted by:	 jwbacon@tds.net (maintainer)
Approved by:	mat (mentor)
Differential Revision:	D4493

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

Upgrade CentOS to 6.6

- Upgrade all things linux-c6- to CentOS 6.6
- Add ports:
  devel/linux-c6-libsigc++20
  graphics/linux-c6-gdk-pixbuf [1]
  graphics/linux-c6-glx-utils
- Add pkg-plists for net/linux-c6-openldap
  and security/linux-c6-cyrus-sasl2
- Misc. cleanups

Differential Revision:	https://reviews.freebsd.org/D1108
Submitted by:	kmoore [1]
Reviewed by:	rene (emulation)
Approved by:	portmgr (swills)
Approved by:	swills (mentor)
Sponsored by:	Perceivon Hosting Inc.

Cleanup plist

Update CentOS base to 6.5, add userland ports

The Fedora 10 infrastructure ports have been in use since June 2009 and, while
having served a great deed, have become unsupported upstream and hence affected
by unfixed security vulnerabilities. In addition to that, many recent Linux
binaries need newer libc / stdlibc++ versions.

This commit adds the linux-c6- userland as drop-in replacement for the -f10
infrastructure, as well as upgrading the linux_base-c6 port to CentOS 6.5.

If you want to switch to linux-c6 ports, please define at /etc/make.conf:

    OVERRIDE_LINUX_BASE_PORT=c6
    OVERRIDE_LINUX_NONBASE_PORTS=c6