Drop .la file.

exists, libtool will add all libraries libB.la refers to (dependency_libs
field) to the linker command line and store them in the dependency_libs
field of libA.la.  So everything that subsequently links with libA will also
link to these extra libraries.  This causes too much overlinking.

This commit modifies Mk/Uses/libtool.mk so it empties the dependency_libs
field in .la libraries during staging.  However, because .la libraries have
very limited use when dependency_libs is empty it makes sense to completely
remove them during staging.

So with this commit USES=libtool is modified to remove .la libraries and a
new form (USES=libtool:keepla) is introduced in case they need to be kept
(dependency_libs is still emptied).

PORTREVISION is bumped on all ports with USES=libtool that install .la
libraries.  Most ports are also changed to add :keepla because .la
libraries have to be kept around as long as there are dependent ports with
.la libraries that refer to them in their dependency_libs field.  In most
cases :keepla can be removed again as soon as all dependent ports that
install .la libraries have some form of USES=libtool added to their
Makefile.

PR:		ports/188759
Exp-run:	bdrewery
Approved by:	portmgr (bdrewery)

a zeising, kwm production, with help from dumbbell, bdrewery:

NEW XORG ON FREEBSD 9-STABLE AND 10-STABLE

This update switches over to use the new xorg stack by default on FreeBSD 9
and 10 stable, on osversions where vt(9) is available.
It is still possible to use the old stack by specifying WITHOUT_NEW_XORG in
/etc/make.conf .
FreeBSD 8-STABLE and released versions of FreeBSD still use
the old version.
A package repository with binary packages for new xorg will
be available soon.

This patch also contains updates of libxcb and related ports, pixman, as well
as some drivers and utilities.

Bump portrevisions for xf86-* ports, as well as virtualbox-ose-additions due
to xserver version change.

Apart from these updates, the way shared libraries are handled has been
changed for all xorg ports, as well as libxml2 and freetype, which means
ltverhack is gone and as a consequence shared libraries have been bumped.
The plan is that this change will make library bumps less likely in the
future.
All affected ports have had their portrevisions bumped as a consequence of
this.

Fix some issues where WITH_NEW_XORG weren't detected properly on CURRENT.

Update instructions, hardware support, and more notes can be found on
https://wiki.freebsd.org/Graphics

Thanks to:	all testers, bdrewery and the FreeBSD x11@ team
exp-run by:	bdrewery [1]
PR:		ports/187602 [1]
Approved by:	portmgr (bdrewery), core (jhb)

A interaction library for iso-codes 3.x and 4.x (when released).