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D Miras: New configure mekefile to include mbus.o and mbus_engine.o
D Miras: Modifications and additions in the Source class to implement the
	video playout buffer and the lip-sync stuff
D Miras new routines and mods (recv, add, schedule, playout) to implement the
	playout buffer, lip-sync and communication via the MBus
D Miras Modifications and additions to code to handle the new nature of the
	Source class. Driven by the 'recv' call inside 'demux' data are
	fed to the playout buffer instead of being playout out directly
D Miras Mods and additions to lead data to the playout buffer instead of the decoder.
	This is done when 'recv' inside 'SessionManaget::demux' is called
D Miras Implements an mbus class. It implements a version of UCL MBus (C Perkins)
	It is used for IPC between rat and vic for the lip-sync stuff (for
	the time being).
D Miras Implements the methods of the mbus class. It is an OO conversion of the mbus.c
	(Feb 98) written by C Perkins
D Miras mbus_engine header file
D Miras MBus engine routines for the ipc between rat and vic for the lip-sync
	stuff (for the moment)
[dm]
Fixes so it works on solaris 2.6 too.
Merge in the DES encryption code. Not very well tested yet...
A couple-of small fixes for linux (I haven't added any grabber code yet,
wait for linux-2.2 and the video4linux integration...)
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vic modified to work as follows:
  works as in original vic-2.8, i.e. no playout buffering and no delay
  calculations take place when lip-sync is not enabled (requested by Chris).
  lip-sync is enabled indirectly via rat (upon a playout mbus message).
  At this point, video packets are buffered, playout delays are calculated
  and exchanged between the video and the audio tool via the mbus.
  Could be nice though if we had a lip-sync button in vic (in the same
  way as it is in rat) to enable lip synchronisation. [dm]
Assorted changes so it runs on Linux with libc6.0 and tcl/tk8.0
Probably this breaks other things: let me know.... [csp]
Fix some endian bugs in the socket setup code??? The new code is the same
as that in rat, which may not necessarily be a good thing.