This is experimental mod-independent multiview protocol implementation

This is pure engine-side modification so you obviously need:
 * 1.32e MV-server to send multiview stream or record multiview server-side demos
 * 1.32e MV-client to query multiview stream and playback multiview demos
  
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client commands:
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 \mvjoin [password] - ask for multiview stream (use regular \record command to record multiview demo)
 \mvleave - return to legacy dm_68/dm_71 protocol

  after demo being recorded - you can play it with regular \demo command

 \mvfollow [clientID] - select POV to clientID during demo playback or use MOUSE2 to cycle next


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server cvars:
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 \sv_demoClients 0   - max.number of client slots for \mvjoin|\mvleave 
                       notice: this takes about 4x more memory than regular player slots

 \sv_demoPassword "" - password for \mvjoin

 \sv_demoFlags  3    - bitmask, periodically issue "score" on client side to get actual stats for
                      1 - server-side autorecorded demos
                      2 - client-side \mvjoin's
						
 \sv_autorecord <numActiveClients> - automatic server-side demo recording if there is <numActiveClients> connected, not affected by sv_demoClients or sv_demoPassword in any way

 \sv_mvFileCount     - max. allowed count of autorecorded files matching "mv-*-*.dm_71" pattern to keep in \demos directory, 0 means no limit
 \sv_mvFolderSize    - max. total size (in megabytes) of autorecorded files matching "mv-*-*.dm_71" pattern to keep in \demos directory, 0 means no limit

					 all files above these limits will be automatically deleted in order to keep free space at desired level

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server commands:
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 \mvrecord [filename] - start server-side demo recording, resulting demos can be later played client-side via \demo command

 notice: you need at least 1 connected client to start, 
 recording will be automatically stopped on last active client (not a bot) disconnect

 \mvstoprecord - stop server-side demo recording
