- check environement on upgrade (per discussion in #1485867)

UPGRADING

@@ -25,6 +25,7 @@ of RoundCube Webmail.
    ./SQL/[yourdbtype].update.sql that are superscribed with the
    currently installed version number.
 5. Make sure 'enable_installer' is set to false again.
+6. Check .htaccess settings (some php settings could become required)
 
 
 For manually upgrading your RoundCube installation follow the instructions

installer/index.php

@@ -47,9 +47,9 @@ if ($RCI->configured && ($RCI->getprop('enable_installer') || $_SESSION['allowin
   exit;
 }
 
-// go to 'test' step if we have a local configuration
+// go to 'check env' step if we have a local configuration
 if ($RCI->configured && empty($_REQUEST['_step'])) {
-  header("Location: ./?_step=3");
+  header("Location: ./?_step=1");
   exit;
 }