INT 21 - DOS 3.1+ - IOCTL - SET SHARING RETRY COUNT

	AX = 440Bh
	CX = pause between retries (default 1)
	DX = number of retries (default 3)
Return: CF clear if successful
	CF set on error
	    AX = error code (01h) (see #01680 at AH=59h/BX=0000h)
Notes:	delay is dependent on processor speed (value in CX specifies number of
	  64K-iteration empty loops to execute)
	if DX=0000h on entry, the retry count is left unchanged
	this function was not supported by Digital Research's DOS Plus
SeeAlso: AH=52h,INT 2F/AX=1224h,INT 2F/AX=122Bh