INT 61 - Banyan VINES - SET UNIDENTIFIED INTERNAL FLAG                          
	AX = 0004h subfn 0018h
	DS:DX -> request block (see #03425)
Return: AX = status
	    0000h success
Desc:	Sets an unidentified BYTE variable in the redirector data segment to 1.
Note:	In the VINES 5.53 "REDIR4" redirector, this variable is located at
	  DS:0B53.


Format of request block:
Offset	Size	Description	(Table 03425)
 00h	WORD	0018h
SeeAlso: #03426