INT 21 - DOS 3.1+ network - REDIRECT DEVICE                                     
	AX = 5F03h
	BL = device type
	    03h printer
	    04h disk drive
	CX = user data to save
		0000h for LANtastic
		4E57h ("NW") for NetWare 4.0 requester
	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 (16 bytes max)
	ES:DI -> 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. network name + 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. password (128 bytes max total)
Return: CF clear if successful
	CF set on error
	    AX = error code (01h,03h,05h,08h,0Fh,12h) (see #01680 at AH=59h)
Notes:	if device type is disk drive, DS:SI must point at either a null string
	  or a string consisting the drive letter followed by a colon; if a
	  null string, the network attempts to access the destination without
	  redirecting a local drive
	the DOS kernel calls INT 2F/AX=111Eh with AX on top of the stack
	also supported by Banyan VINES, LANtastic, and 10NET
SeeAlso: AX=5F02h,AX=5F04h,INT 2F/AX=111Eh,INT 60/AX=0002h