Add vtallow.1

Makefile

@@ -110,6 +110,7 @@ MAN1 = \
 	truncate.1          \
 	unshare.1           \
 	uptime.1            \
+	vtallow.1           \
 	watch.1             \
 	who.1
 

vtallow.1

@@ -0,0 +1,22 @@
+.Dd December 5, 2014
+.Dt VTALLOW 1 ubase\-VERSION
+.Os
+.Sh NAME
+.Nm vtallow
+.Nd enable or disable the VT switch
+.Sh SYNOPSIS
+.Nm vtallow
+.Ar n | Ar y
+.Sh DESCRIPTION
+.Nm
+controls the VT switch lock.
+.Pp
+.Sh OPTIONS
+.Bl -tag -width Ds
+.It Ar n
+Disable VT switching.
+.It Ar y
+Enable VT switching.
+.El
+.Sh SEE ALSO
+.Xr chvt 1

vtallow.c

@@ -18,7 +18,7 @@
 static void
 usage(void)
 {
-	eprintf("usage: vtallow n|y\n");
+	eprintf("usage: vtallow n | y\n");
 }
 
 int