support new JenkinsPlugin type (jpi)

core/src/main/java/hudson/PluginStrategy.java

@@ -45,7 +45,7 @@ public interface PluginStrategy extends ExtensionPoint {
 	/**
 	 * Creates a plugin wrapper, which provides a management interface for the plugin
 	 * @param archive
-     *      Either a directory that points to a pre-exploded plugin, or an hpi file, or an hpl file.
+     *      Either a directory that points to a pre-exploded plugin, or an jpi file, or an jpl file.
 	 */
 	PluginWrapper createPluginWrapper(File archive)
 			throws IOException;