Reintroduce oldstatic module cacheing. It is still used in JDocumentH…

…TML and I got a sneaking suspicion that removing i causes more issues than we are aware of.

libraries/legacy/module/helper.php

@@ -384,6 +384,8 @@ protected static function &_load()
 	 * Caching modes:
 	 * To be set in XML:
 	 * 'static'      One cache file for all pages with the same module parameters
+	 * 'oldstatic'   1.5 definition of module caching, one cache file for all pages
+	 *               with the same module id and user aid,
 	 * 'itemid'      Changes on itemid change, to be called from inside the module:
 	 * 'safeuri'     Id created from $cacheparams->modeparams array,
 	 * 'id'          Module sets own cache id's
@@ -477,6 +479,16 @@ public static function moduleCache($module, $moduleparams, $cacheparams)
 				);
 				break;
 
+			case 'oldstatic': // provided for backward compatibility, not really usefull
+				$ret = $cache->get(
+					array($cacheparams->class, $cacheparams->method),
+					$cacheparams->methodparams,
+					$module->id . $view_levels,
+					$wrkarounds,
+					$wrkaroundoptions
+				);
+				break;
+
 			case 'itemid':
 			default:
 				$ret = $cache->get(