add doc on new parameter 'Attribute'

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index da8d793..7dc4e97 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -8725,6 +8725,15 @@ create output in the I<JavaScript Object Notation> (JSON). When set to KAIROSDB
 
 Defaults to B<Command>.
 
+=item B<Attribute> I<String> I<String>
+
+Only available for KAIROSDB output format.
+
+Consider the two given strings to be the key and value of an additional tag for
+each metric being sent out.
+
+You can add multiple B<Attribute>.
+
 =item B<Metrics> B<true>|B<false>
 
 Controls whether I<metrics> are POSTed to this location. Defaults to B<true>.