INT 61 - Banyan VINES - GET USER NAME                                           
	AX = 0004h subfn 0005h
	DS:DX -> request block (see #03406)
Return: AX = status (see also #03400)
	    0000h user name returned in request block
Desc:	Returns the StreetTalk name of the currently logged in user
SeeAlso: AX=0004h/SF=0004h,[ID 0004h]">#03431 [ID 0004h],AX=0007h/BX=0005h
SeeAlso: AX=0004h/SF=0004h


Format of VINES Function 0004h/Subfunction 0005h request block:
Offset	Size	Description	(Table 03406)
 00h	WORD	0005h (subfunction "Get User Name")
 02h 64	BYTE	buffer for null-terminated user name