Adds version info to docs for new Circonus options.

website/source/docs/agent/options.html.markdown

@@ -817,10 +817,10 @@ Consul will not enable TLS for the HTTP API unless the `https` port has been ass
     A special tag which, when coupled with the instance id, helps to narrow down the search results when neither a Submission URL or Check ID is provided. By default, this is set to service:application name (e.g. "service:consul").
 
   * <a name="telemetry-circonus_check_display_name"</a><a href="#telemetry-circonus_check_display_name">`circonus_check_display_name`</a>
-    Specifies a name to give a check when it is created. This name is displayed in the Circonus UI Checks list.
+    Specifies a name to give a check when it is created. This name is displayed in the Circonus UI Checks list. Available in Consul 0.7.1 and later.
 
   * <a name="telemetry-circonus_check_tags"</a><a href="telemetry-circonus_check_tags">`circonus_check_tags`</a>
-    Comma separated list of additional tags to add to a check when it is created.
+    Comma separated list of additional tags to add to a check when it is created. Available in Consul 0.7.1 and later.
 
   * <a name="telemetry-circonus_broker_id"></a><a href="#telemetry-circonus_broker_id">`circonus_broker_id`</a>
     The ID of a specific Circonus Broker to use when creating a new check. The numeric portion of `broker._cid` field in a Broker API object. If metric management is enabled and neither a Submission URL nor Check ID is provided, an attempt will be made to search for an existing check using Instance ID and Search Tag. If one is not found, a new HTTPTRAP check will be created. By default, this is not used and a random Enterprise Broker is selected, or the default Circonus Public Broker.