Release version 2.6.1

This release improves a few things:

* Compatibility with multi-domains
* Use the User-Agent "TYPO3/7.6.0 Newsletter/2.6.1" for all HTTP requests
* Respect specified PID for RecipientList and BounceAccount

Author: PowerKiKi

ext_emconf.php

@@ -5,7 +5,7 @@
     'description' => 'Send any pages as Newsletter and provide statistics on opened emails and clicked links.',
     'category' => 'module',
     'shy' => 0,
-    'version' => '2.6.0',
+    'version' => '2.6.1',
     'dependencies' => '',
     'conflicts' => '',
     'priority' => '',