Document the recent change in group wheel semantics. Also, it wasn't
previously documented that anyone could su to root if group 0 didn't exist.
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@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)su.1 8.2 (Berkeley) 4/18/94
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.\" $NetBSD: su.1,v 1.9 1997/01/20 07:14:35 cjs Exp $
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.\" $NetBSD: su.1,v 1.10 1997/01/31 23:12:17 ghudson Exp $
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.\"
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.Dd April 18, 1994
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.Dt SU 1
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@ -142,7 +142,17 @@ Only users in group 0 (normally
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can
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.Nm su
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to
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.Dq root .
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.Dq root ,
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unless group 0 does not exist or has no members. (If you want nobody
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to be able to
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.Nm su
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to
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.Dq root ,
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make
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.Dq root
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the only member of group
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.Dq wheel ,
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which is the default.)
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.Pp
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By default (unless the prompt is reset by a startup file) the super-user
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prompt is set to
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