Document where chio(1) originated from & which version of FreeBSD first included it.

PR:		211776
Approved by:	bcr (mentor)
MFC after:	5 days
Differential Revision:	https://reviews.freebsd.org/D8104

bin/chio/chio.1

@@ -32,7 +32,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 2, 2016
+.Dd October 5, 2016
 .Dt CHIO 1
 .Os
 .Sh NAME
@@ -287,6 +287,14 @@ Configure the changer to use picker 2 (third picker) for operations.
 .Sh SEE ALSO
 .Xr mt 1 ,
 .Xr mount 8
+.Sh HISTORY
+A
+.Nm
+utility appeared in
+.Nx 1.3 .
+.Nm
+first appeared in
+.Fx 2.2 .
 .Sh AUTHORS
 .An -nosplit
 The