INT 14 - TelAPI - "telclose" - TERMINATE TELNET CONNECTION
	AH = E1h
	BX = connection ID
Return: AX = status (0000h,FFF7h,maybe others) (see #00397)
Note:	flushes and releases all buffers and data space used by the connection
SeeAlso: AH=E0h,AH=E6h,AX=FF00h