INT 61 - Banyan VINES - GET USER NAME                                           
	AX = 0007h
	BX = 0005h
	DS:DX -> 64-byte buffer for user's StreetTalk name
Return: AX = status (see also #03432)
	    0000h successful
	    0001h network software not installed or incompatible
Note:	if no user logged in, first byte of returned name will be 00h
SeeAlso: AX=0007h/BX=0007h