INT 2F CU - NETWORK REDIRECTOR - SEEK FROM END OF REMOTE FILE                   
	AX = 1121h
	CX:DX = offset (in bytes) from end
	ES:DI -> SFTsee System File Table
	    SFTsee System File Table DPBsee Drive Paramter Block field -> DPBsee Drive Paramter Block of drive with file
	SS = DOS DS
Return: CF set on error
	    AL = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
	CF clear if successful
	    DX:AX = new file position
Note:	this function is called by the DOS 3.1+ kernel, but only when seeking
	  from the end of a file opened with sharing modes set in such a
	  manner that another process is able to change the size of the file
	  while it is already open
SeeAlso: AX=1228h,INT 21/AH=42h