Clarify that what was previously known as -A root is now -A forceroot, not

-A softroot and that -A root can still be used for historical reasons.

sbin/raidctl/raidctl.8

@@ -1,4 +1,4 @@
-.\"     $NetBSD: raidctl.8,v 1.67 2014/04/03 18:54:10 christos Exp $
+.\"     $NetBSD: raidctl.8,v 1.68 2015/06/30 17:18:13 sborrill Exp $
 .\"
 .\" Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -175,6 +175,16 @@ in the disklabel.
 Note that only certain architectures
 .Pq currently alpha, amd64, i386, pmax, sandpoint, sparc, sparc64, and vax
 support booting a kernel directly from a RAID set.
+Please note that
+.Ic forceroot
+mode was referred to as
+.Ic root
+mode on earlier versions of
+.Nx .
+For compatibility reasons,
+.Ic root
+can be used as an alias for
+.Ic forceroot.
 .It Fl A Ic softroot Ar dev
 Like
 .Ic forceroot ,
@@ -1265,7 +1275,7 @@ partition of such a RAID set being used for
 .Pa / .
 To use raid0a as the root file system, simply use:
 .Bd -literal -offset indent
-raidctl -A root raid0
+raidctl -A forceroot raid0
 .Ed
 .Pp
 To return raid0a to be just an auto-configuring set simply use the