INT 2F - NETWORK REDIRECTOR - OPEN EXISTING REMOTE FILE

	AX = 1116h
	ES:DI -> uninitialized SFT
	SS = DOS DS
	SDA first filename pointer -> fully-qualified name of file to open
	STACK: WORD file access and sharing modes (see #01402 at INT 21/AH=3Dh)
Return: CF set on error
	    AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
	CF clear if successful
	    SFT filled (except handle count, which DOS manages itself)
	STACK unchanged
Note:	this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1106h,AX=1115h,AX=1117h,AX=1118h,AX=112Eh,INT 21/AH=3Dh
SeeAlso: INT 21/AH=60h