Add append_if_no_such_line compatablity define

manifests/defines/append_if_no_such_line.pp

@@ -0,0 +1,14 @@
+#
+# This define is only for "CFEngine compatability". It is only a light
+# wrapper around the "line" define, which is equally dangerous, but at
+# least named according to a proper resource model.
+#
+define append_if_no_such_line($file, $line) {
+	line {
+		$name:
+			ensure => present,
+			file => $file,
+			line => $line;
+	}
+}
+