This resolves issues with non-starting mate-screensaver which
 relies on the IDLETIME API these days.

 This commit backports the following X.org Xserver commits:

    commit a2e67a6412386782cb8b644b86a5744591397d45
    Author: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
    Date:   Mon Dec 6 11:24:01 2010 +1100

        IDLETIME: Fix edge-case in IdleTimeBlockHandler

        Ensure that if we're called exactly on the threshold of a
        NegativeTransition trigger that we reshedule to pick up
        an idle time over the threshold.
Signed-off-by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

    commit 1f4fb0225b278d1cf4145aebeb0bdd23dc8f62d5
    Author: Adam Jackson <ajax@redhat.com>
    Date:   Wed Dec 10 16:13:20 2008 -0500

        xsync: Fix wakeup storm in idletime counter.

        Wakeup scheduling only considered the threshold values, and not whether
        the trigger was edge or level.

        See also:
        https://bugzilla.redhat.com/show_bug.cgi?id=474586
        http://svn.gnome.org/viewvc/gnome-screensaver/trunk/src/test-idle-ext.c?view=markup

    commit 0f9e89b4e309e570d7d366489d250ca2143f0ad7
    Author: Fredrik Höglund <fredrik@kde.org>
    Date:   Tue Aug 14 22:47:49 2007 +0200

        Fix the value comparisons in the IDLETIME wakeup handler.

        LessThan/GreaterThan comparisons were used in the wakeup handler,
        and LessOrEqual/GreaterOrEqual in the block handler.

        Change it to use LessOrEqual/GreaterOrEqual in both functions,
        since this is what XSyncNegativeComparison and
        XSyncPositiveComparison imply.

    commit 7e2c935920cafadbd87c351f1a3239932864fb90
    Author: Fredrik Höglund <fredrik@kde.org>
    Date:   Fri May 18 20:06:14 2007 +0200

        Add a new IDLETIME system sync counter.

        This counter exposes the time in milliseconds since the last
        input event. Clients such as screen savers and power managers
        can set an alarm on this counter to find out when the idle time
        reaches a certain value, without having to poll the server.
Backport-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

What actually happened was that MFLAGS were passed-through more
correctly, which forced make into jobserver mode (due to the inclusion
of --jobserver-fds=... in %{_smp_mflags}), but the processes were not
able to read from their FD's, so it defaulted to non-parallel builds
instead.

Attributes GH PR #702: https://github.com/ArcticaProject/nx-libs/pull/702

Fixes ArcticaProject/nx-libs#701

Attributes GH PR #695: https://github.com/ArcticaProject/nx-libs/pull/695

  Fixes ArcticaProject/nx-libs#694

Attributes GH PR #689: https://github.com/ArcticaProject/nx-libs/pull/689

nxagentHandleConfigureNotify() has an optimization that accumulates
ConfigureNotify events from the queue to only perform the changes of
the last ConfigureNotify event in the queue. But that code used to
ignore position changes and only adapt the new window position if the
last event happened to contain a position change.

This change ensures the latest position change - if any - found in the
queue will be applied after the accumulation.

Fixes: ArticaProject/nx-libs#688 (second part)

Was 0,0 on every call...

This is the preferred way. It ensures, that
a) the data is zeroed
b) a correct size in case xlib is changing the size of the structure in future releases

nxagentSetWMNormalHints was slightly adapted therefore

debian/rules: Highly enforce --no-parallel mode while Xserver is still on imake. Can be re-parallelized after autotools conversion.

Attributes GH PR #686: https://github.com/ArcticaProject/nx-libs/pull/686

Revert "debian/rules: Avoid dh_auto_build. It adds -Oline since 11.2 which let's make choke in nx-X11/ subdir on the Makefiles target. Reason unknown."

This reverts commit 94d77e27.

This reverts commit 190e3df4.

debian/rules: Drop override_dh_clean. Makefile (et al.) removal in nx-X11/ has now been moved to the distclean target.

debian/rules: Avoid dh_auto_build. It adds -Oline since 11.2 which let's make choke in nx-X11/ subdir on the Makefiles target. Reason unknown.

Makefile targets: Rewriting and consolidating the target structure for nx-X11/ subdir (except nx-X11/lib/).

Makefile: Don't do a parallel clean-up of nx-X11. We have seen failures and due to the upcoming switch to autotools, it is pointless to dive into fixing it in the Imakefile stack.