fixed a double-http typo

doc/seruser/operation.sgml

@@ -357,7 +357,7 @@ warning: IP extract from warning activated to be more informational
 			    <para>
 				One can also use other <application>syslogd</application>
 				implementation. <application>metalog</application>
-				(<ulink url="http://http://metalog.sourceforge.net//">
+				(<ulink url="http://metalog.sourceforge.net/">
 				    http://metalog.sourceforge.net/
 				</ulink>)
 				features regular expression matching that enables