sde-create-iso: enhanced program paramaters to allow easied definition of optical media

bin/sde-create-iso

@@ -23,6 +23,18 @@
 
 create_usage() {
 	local progname=$(echo ${0##*/} | tr '-' ' ')
-        echo "Usage: $progname -t <cd|dvd> <config> [<config>....]"
+        cat <<-EOT
+	Usage: $progname [-t <type>] [-s <size>] <config> [<config>....]"
+	Type:
+	    c25  - CD 25 MB
+	    c50  - CD 50 MB
+	    c100 - CD 100 MB
+	    c700 - CD 700 MB
+	    d4   - DVD 4.7 GB
+	Size:
+	    size of desired disk in MB
+	Type and Size are optional, but at leasr one is required.
+	EOT
+	exit 1
 }