Add support for interfaces in our temporary autoloaders, not only for classes.

lib/SimpleSAML/Module.php

@@ -42,14 +42,15 @@ class Module
         }
         require_once($file);
 
-        if (!class_exists($className, false)) {
+        if (!class_exists($className, false) && !interface_exists($className, false)) {
             // the file exists, but the class is not defined. Is it using namespaces?
             $nspath = join('\\', $path);
-            if (class_exists('SimpleSAML\Module\\'.$module.'\\'.$nspath)) {
+            if (class_exists('SimpleSAML\Module\\'.$module.'\\'.$nspath) ||
+                interface_exists('SimpleSAML\Module\\'.$module.'\\'.$nspath)) {
                 // the class has been migrated, create an alias and warn about it
                 \SimpleSAML\Logger::warning(
-                    "The class '$className' is now using namespaces, please use 'SimpleSAML\\Module\\$module\\".
-                    "$nspath' instead."
+                    "The class or interface '$className' is now using namespaces, please use 'SimpleSAML\\Module\\".
+                    $module."\\".$nspath."' instead."
                 );
                 class_alias("SimpleSAML\\Module\\$module\\$nspath", $className);
             }

lib/_autoload_modules.php

@@ -31,18 +31,17 @@ function temporaryLoader($class)
     }
 
     // it exists, so it's not yet migrated to namespaces
-    if (class_exists($class, false)) {
+    if (class_exists($class, false) || interface_exists($class, false)) {
         return;
     }
 
     // it didn't exist, try to see if it was migrated to namespaces
     $new = join('\\', $path);
-    if (class_exists($new, false)) { // do not try to autoload it if it doesn't exist! It should!
+    if (class_exists($new, false) || interface_exists($class, false)) {
+        // do not try to autoload it if it doesn't exist! It should!
         class_alias($new, $class);
-        SimpleSAML\Logger::warning("The class '$class' is now using namespaces, please use '$new'.");
+        SimpleSAML\Logger::warning("The class or interface '$class' is now using namespaces, please use '$new'.");
     }
-
-
 }
 
 spl_autoload_register("temporaryLoader");