- fixed exit in embedded mode when fullscreen.
   - re-use the current video sub-window when switching to fullscreen (to have opengl working in fullscreen mode as well).
   - add options to the opengl plugin.

- bind to ::1 by default if --ipv6 is passed,
- do not overflow Unix socket path,
- use a different option (--rc-unix) for Unix socket.

* modules/control/rc.c: added option to listen on a socket instead of only stdin.
   Inspired from a patch by Bernhard Rosenkraenzer <bero at arklinux dot org>.

(thanks to Olivier Lourdais for the report)

report).

- fixed read after freeaddrinfo() bug,
- removed extraneous debug messages

* modules/access/screen.c: new screen capture access module. Only X11 for now but should be straight-forward to adapt to other platforms.