add rrdcached support to collectd

git-svn-id: http://www.observium.org/svn/observer/trunk@1601 61d68cd4-352d-0410-923a-c4978735b2b8

html/includes/collectd/config.php

@@ -4,7 +4,7 @@
  */
 
 // Array of paths when collectd's rrdtool plugin writes RRDs
-$config['datadirs']   = array('/var/lib/collectd/rrd/');
+$config['datadirs']   = array($config['collectd_dir']);
 // Width of graph to be generated by rrdgraph
 if(isset($_GET['width'])) {
  $config['rrd_width'] = $_GET['width'];