Copyright update

Author: antenore

remmina/ui/remmina_about.glade

@@ -24,15 +24,15 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   <!-- interface-license-type gplv2 -->
   <!-- interface-name Remmina -->
   <!-- interface-description The GTK+ Remmina Remote Desktop Client -->
-  <!-- interface-copyright Antenore Gatta & Giovanni Panozzo 2014-2016 -->
+  <!-- interface-copyright Antenore Gatta & Giovanni Panozzo 2014-2018 -->
   <object class="GtkAboutDialog" id="dialog_remmina_about">
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">About Remmina</property>
     <property name="modal">True</property>
     <property name="type_hint">dialog</property>
     <property name="program_name">Remmina</property>
     <property name="copyright">
-Copyright (C) 2014-2017 Antenore Gatta, Giovanni Panozzo.
+Copyright (C) 2014-2018 Antenore Gatta, Giovanni Panozzo.
 Copyright (C) 2009-2014 Vic Lee
 See COPYING for more details
     </property>