03_vblade_usage.patch: Used for avoiding calling vbladed without arguments,
			and while at it, add the usage command line.
Index: vblade/vbladed
===================================================================
--- vblade.orig/vbladed
+++ vblade/vbladed
@@ -3,4 +3,14 @@
 # output is directed to syslogd
 #
 
+# Although logging goes to syslog, let's going to
+# protect ourselves against the most common way or
+# calling vbladed: without arguments.  While at it, we guard
+# ourselves against wrong number of parameters.
+if [ $# -lt 4 ]
+then
+    echo "usage: ./vblade <shelf> <slot> <ethn> <device>" >&2
+    exit 1
+fi
+
 sh -c "`dirname $0`/vblade $* < /dev/null 2>&1 | logger -t vbladed" &