Prepare releases.

docs/RELEASE_NOTES

@@ -1,11 +1,11 @@
 <?php
 /* Security release? */
-$notes['security'] = true;
+$notes['security'] = false;
 
 /* Mailing list release notes. */
 $notes['changes'] = <<<ML
 The Horde Team is pleased to announce the final release of the Turba Contact
-Manager version H5 (4.2.20).
+Manager version H5 (4.2.21).
 
 Turba is the Horde contact management application. Leveraging the Horde
 framework to provide seamless integration with IMP and other Horde
@@ -19,9 +19,8 @@ http://www.horde.org/apps/turba/docs/UPGRADING
 For detailed installation and configuration instructions, please see
 http://www.horde.org/apps/turba/docs/INSTALL
 
-The major changes compared to the Turba version H5 (4.2.19) are:
-    * Fixed open redirects.
-    * Small bugfix.
+The major changes compared to the Turba version H5 (4.2.20) are:
+    * Officially support PHP 7.
 ML;
 
 $notes['name'] = 'Turba';