INT 21 - Novell NetWare v4 - CHANGE CONNECTION STATE                            
	AX = F217h subfn 1Dh
	CX = length of request buffer in bytes
	DX = length of reply buffer in bytes
	DS:SI -> request buffer (see #02180)
	ES:DI -> reply buffer
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
	reply buffer filled


Format of NetWare "Change Connection State" requst buffer:
Offset	Size	Description	(Table 02180)
 00h	WORD	length of following data
 02h	BYTE	1Dh (subfunction "Change Connection State")
 03h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	new state