Merge remote-tracking branch 'origin/QA_4_1' into QA_4_1

ChangeLog

@@ -5,6 +5,7 @@ phpMyAdmin - ChangeLog
 - bug #4334 Add event : datepicker won't open
 - bug #4338 Fix missing value error while executing SQL query
 - TCPDF library is now optional dependency
+- bug #4326 Cannot find the import plugins which start with uppercase 'I'
 
 4.1.11.0 (2014-03-23)
 - bug #4335 reCaptcha problem (4.1.10 regression) 

libraries/plugin_interface.lib.php

@@ -58,8 +58,8 @@ function PMA_getPlugins($plugin_type, $plugins_dir, $plugin_param)
             // (for example ._csv.php) so the following regexp
             // matches a file which does not start with a dot but ends
             // with ".php"
-            $class_type = strtoupper($plugin_type[0])
-                . strtolower(substr($plugin_type, 1));
+            $class_type = mb_strtoupper($plugin_type[0], 'UTF-8')
+                . mb_strtolower(substr($plugin_type, 1), 'UTF-8');
             if (is_file($plugins_dir . $file)
                 && preg_match(
                     '@^' . $class_type . '(.+)\.class\.php$@i',