docs/plugins/: Updates.

docs/plugins/: Updates.

Original commit message from CVS:
2005-12-18  Julien MOUTTE  <julien@moutte.net>

* docs/plugins/gst-plugins-bad-plugins-decl.txt:
* docs/plugins/gst-plugins-bad-plugins-undocumented.txt:
Updates.
* ext/directfb/dfbvideosink.c:
(gst_dfbvideosink_surface_create),
(gst_dfbvideosink_event_thread),
(gst_dfbvideosink_enum_devices),
(gst_dfbvideosink_setup), (gst_dfbvideosink_cleanup),
(gst_dfbvideosink_can_blit_from_format),
(gst_dfbvideosink_getcaps), (gst_dfbvideosink_setcaps),
(gst_dfbvideosink_show_frame), (gst_dfbvideosink_buffer_alloc),
(gst_dfbsurface_finalize),
(gst_dfbvideosink_navigation_send_event),
(gst_dfbvideosink_update_colorbalance),
(gst_dfbvideosink_set_property),
(gst_dfbvideosink_get_property),
(gst_dfbvideosink_finalize), (gst_dfbvideosink_init),
(gst_dfbvideosink_class_init):
* ext/directfb/dfbvideosink.h: Implement pixel-aspect-ratio.
This should work both for hardware accelerated scaling and
reverse caps negotiation with a scaling element.