INT 21 - DOS 3.1+ network - CANCEL REDIRECTION                                  
	AX = 5F04h
	DS:SI -> ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. local device name or path
	CX = 4E57h ("NW") for NetWare 4.0 requester
Return: CF clear if successful
	CF set on error
	    AX = error code (01h,03h,05h,08h,0Fh,12h) (see #01680 at AH=59h)
Notes:	the DS:SI string must be either a local device name, a drive letter
	  followed by a colon, or a network directory beginning with two
	  backslashes
	the DOS kernel calls INT 2F/AX=111Eh with AX on top of the stack
	also supported by Banyan VINES, LANtastic, and 10NET
	for NetWare, if only a server name is specified (i.e. "\\SERVER"),
	  the connection to that server will be closed
SeeAlso: AX=5F03h,INT 2F/AX=111Eh,INT 60/AX=0003h