Document the fact that id is POSIX.2 compliant.

This manpage must have been derrived from the logname manpage, remove
logname cruft.

usr.bin/id/id.1

@@ -33,7 +33,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"	from: @(#)id.1	5.1 (Berkeley) 6/29/91
-.\"	$Id: id.1,v 1.2 1993/08/01 07:32:09 mycroft Exp $
+.\"	$Id: id.1,v 1.3 1993/08/28 04:39:51 jtc Exp $
 .\"
 .Dd "June 29, 1991"
 .Dt ID 1
@@ -100,11 +100,6 @@ utility exits 0 on success, and >0 if an error occurs.
 .Xr whoami 1
 .Sh STANDARDS
 The
-.Nm logname
-function is expected to conform to
-.St -p1003.2 .
-.Sh HISTORY
-The
-.Nm
-command is
-.Ud .
+.Nm id
+utility conforms to 
+.St -p1003.2-92 .