INT 14 - Connection Manager - CLOSE COMMUNICATION                               
	AH = 05h
	DX = FFFFh
	AL = connection ID
Return: AH = return code
	    00h successful
	    01h no such connection
	    02h invalid connection ID
		AL = correct connection ID
Desc:	terminate existing connection to allow another one to be established
Note:	if DX is 0-3 on entry, Connection Manager emulates the standard BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.
	  function, but redirects the port over the network; if DX is any other
	  value, the call is chained
SeeAlso: AH=04h/DX=FFFFh,AH=0Dh/DX=FFFFh