Updated documentation for radius module.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3173 44740490-163a-0410-bde0-09ae8108e29a

modules/radius/docs/radius.txt

@@ -39,6 +39,9 @@ authentication source which uses the `radius:Radius` module to
 
         /*
          * The number of times we should retry connections to the RADIUS server.
+	 * Please note that retries would be attempted with each server before
+	 * trying with the next server in the queue, so if you want not to wait
+	 * before trying the next server, retries should be set to 1.
          * Optional, defaults to 3 attempts.
          */
         'retries' => 3,