'ls -n' opens password file for reading

[Adri Verhoef]

>Works fine on HP-UX (300 and 800 (Oops, not on 500 :-)).
>
>Moral: Please mention supplier, OS name and release.

``ls -n'' failing to work:
3b2 sVr2.0  2.0.4  2.0.5
M380 XENIX sVr2.2.1
VAX UNIQ sVr3.0
			Working:
				BSD 4.1
				PDP11/73 XENIX 3.0
				altos 986 XENIX 2.5a