INT 61 - Banyan VINES - LOGOUT FROM VINES                                       
	AX = 0004h subfn 000Ch
	DS:DX -> request block (see #03415)
Return: AX = status 0000h (see #03400)
Desc:	Terminates a running VINES session and clears all session specific
	  buffers
SeeAlso: AX=0004h/SF=0008h


Format of VINES Function 0004h/Subfunction 000Ch request block:
Offset	Size	Description	(Table 03415)
 00h	WORD	000Ch