Fix additional_message_headers plugin compatibility with Mail_Mime >= 1.9 (...

Aleksander Machniak

2016-02-09 b2d4cfa89a9d498f98b5d19ac496cf9f70f92070

 plugins/additional_message_headers/package.xml

@@ -13,11 +13,10 @@
  <email>email@example.org</email>
  <active>yes</active>
 </lead>
 <date>2010-01-16</date>
 <time>18:19:33</time>
 <date>2013-08-25</date>
 <version>
  <release>1.1.0</release>
  <api>1.1.0</api>
  <release>1.2.0</release>
  <api>1.2.1</api>
 </version>
 <stability>
  <release>stable</release>