[nagiosplug] developer-guidelines.sgml: Update copyright year

[Nagios Plugin Development]

 Module: nagiosplug
 Branch: master
 Commit: 57895483731a991a9022019474cab234ba4e9818
 Author: Holger Weiss <holger at zedat.fu-berlin.de>
   Date: Tue Aug 27 18:42:51 2013 +0200
    URL: http://nagiosplug.git.sf.net/git/gitweb.cgi?p=nagiosplug/nagiosplug;a=commit;h=5789548

developer-guidelines.sgml: Update copyright year

We touched the Development Guidelines this year.

---

 doc/developer-guidelines.sgml |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/developer-guidelines.sgml b/doc/developer-guidelines.sgml
index 599b2a1..eb5b039 100644
--- a/doc/developer-guidelines.sgml
+++ b/doc/developer-guidelines.sgml
@@ -11,7 +11,7 @@
       </author>
     </authorgroup>
 
-    <pubdate>2009</pubdate>
+    <pubdate>2013</pubdate>
     <title>Nagios plug-in development guidelines</title>
 	
     <revhistory>
@@ -22,7 +22,7 @@
     </revhistory>
 
 	<copyright>
-		<year>2000 - 2009</year>
+		<year>2000 - 2013</year>
 		<holder>Nagios Plugins Development Team</holder>
 	</copyright>
 
@@ -34,7 +34,7 @@
     the plug-in developers and encourage the standarization of the
     different kind of plug-ins: C, shell, perl, python, etc.</para>
 
-        <para>Nagios Plug-in Development Guidelines Copyright (C) 2000-2009
+        <para>Nagios Plug-in Development Guidelines Copyright (C) 2000-2013
         (Nagios Plugins Team)</para>
 
         <para>Permission is granted to make and distribute verbatim