Format of LZSINFO structure:
Offset	Size	Description	)
 00h  6 BYTEs	signature "LZSAPI"
 06h	WORD	server version (200 (0C8h) for Stacker 4 and Stacker Anywhere)
 08h  4 BYTEs	vendor signature
		"STAC" = Stac Electronics, Inc.
 0Ch  6 BYTEs	???
 12h	WORD	bit flags: server status/capabilities (see #02809)
 14h	DWORD	-> Stacker 3.X-compatible compression procedure
 18h	DWORD	-> Stacker 3.X-compatible decompression procedure
 1Ch  4 BYTEs	reserved (always set to 0)
 20h	DWORD	-> incremental Stacker 3.x-compatible compression procedure
		  (see #02810)
 24h  4 BYTEs	???
 28h	DWORD	-> incremental Stacker 3.x-compatible decompression procedure
		  (see #02811)
 2Ch  4	BYTES	???
 30h	DWORD	-> new (Stacker 4) compression procedure
 34h  4 BYTEs	???
 38h	DWORD	-> new (Stacker 4) decompression procedure
Notes:	Stacker 4 usally keeps two different data-compression algorithms in
	  memory (preferably in XMA):
	    1) new (Stacker 4) data compression algorithm (4K LZ77 with hashing
		  and static Huffman encoding), and
	    2) old (Stacker 3.x-compatible) one (2K LZ77 with hashing), which
		  is used to work with STACVOL files created under older
		  versions of Stacker.