Update version to 2.4.0

VERSION

@@ -1 +1 @@
-v2.3.4
+v2.4.0

icingaweb2.spec

@@ -3,7 +3,7 @@
 %define revision 1
 
 Name:           icingaweb2
-Version:        2.3.4
+Version:        2.4.0
 Release:        %{revision}%{?dist}
 Summary:        Icinga Web 2
 Group:          Applications/System

library/Icinga/Application/Version.php

@@ -8,7 +8,7 @@ namespace Icinga\Application;
  */
 class Version
 {
-    const VERSION = '2.3.4';
+    const VERSION = '2.4.0';
 
     /**
      * Get the version of this instance of Icinga Web 2

modules/doc/module.info

@@ -1,4 +1,4 @@
 Module: doc
-Version: 2.3.4
+Version: 2.4.0
 Description: Documentation module
  Extracts, shows and exports documentation for Icinga Web 2 and its modules.

modules/monitoring/module.info

@@ -1,5 +1,5 @@
 Module: monitoring
-Version: 2.3.4
+Version: 2.4.0
 Description: Icinga monitoring module
  This is the core module for most Icingaweb users. It provides an
  abstraction layer for various Icinga data backends.

modules/setup/module.info

@@ -1,5 +1,5 @@
 Module: setup
-Version: 2.3.4
+Version: 2.4.0
 Description: Setup module
  Web based wizard for setting up Icinga Web 2 and its modules.
  This includes the data backends (e.g. relational database, LDAP),

modules/test/module.info

@@ -1,5 +1,5 @@
 Module: test
-Version: 2.3.4
+Version: 2.4.0
 Description: Translation module
  This module allows developers to run (unit) tests against Icinga Web 2 and
  any of its modules. Usually you do not need to enable this.

modules/translation/module.info

@@ -1,5 +1,5 @@
 Module: translation
-Version: 2.3.4
+Version: 2.4.0
 Description: Translation module
  This module allows developers and translators to translate Icinga Web 2 and
  its modules for multiple languages. You do not need this module to run an