contrib: prevent some rare linking errors on OSX by providing the minimal OS version also at link-time

On Windows, it hopefully solves crashes at termination for skins2

Removed references to the old HTTP interface removed by commit [ad16fc37]
Signed-off-by: Derk-Jan Hartman <hartman@videolan.org>
(cherry picked from commit 4ef9c9fd)
Signed-off-by: Derk-Jan Hartman <hartman@videolan.org>

Add -lws2 for access_output_rtmp

(cherry picked from commit 875d8873)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

(cherry picked from commit d65ad9ba)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

What is probably a libtool version mismatch prevents us from
easily rebootstrapping. To avoid that, we patch Makefile.in and
that's it.

Seems that NSIS does not like it:
http://buildbot.videolan.org/builders/NB-I386-Win32Cross-Branch/builds/125/steps/Create%20package/logs/stdio

(cherry picked from commit 7935d5a8)
Signed-off-by: Derk-Jan Hartman <hartman@videolan.org>

I'll look at this again tomorrow.

This reverts commit be40e542.

(cherry picked from commit 1cfb626f)

This reverts commit ccc1a9c2.

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>

It fixes the regression when doing close jumps.
(cherry picked from commit f607feae)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Fix 88d70be0, that was badly cherry-picked.

(cherry picked from commit 66b985c3)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

(cherry picked from commit f52b2b2d)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

 It vastly improves CPU usage but it does not fix the underlaying problem
of using sleep instead of a signal.

manually cherry-picked by jb@videolan.org

Manually chery-picked by jb@videolan.org

Manually Cherry-picked by Jean-Baptiste Kempf <jb@videolan.org>

Cherry-picked manually by jb@videolan.org

(cherry picked from commit cd2f1447)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>