docs(): updated readme

README.md

@@ -3,6 +3,7 @@
 [Website](http://grafana.org) |
 [Twitter](https://twitter.com/grafana) |
 [IRC](https://webchat.freenode.net/?channels=grafana) |
+[Slack](https://slack.raintank.io) |
 [Email](mailto:contact@grafana.org)
 
 Grafana is an open source, feature rich metrics dashboard and graph editor for

public/app/features/plugins/partials/ds_http_settings.html

@@ -5,7 +5,7 @@
 
 	<div class="gf-form">
 		<span class="gf-form-label width-7">Url</span>
-		<input class="gf-form-input max-width-21" type="text" ng-model='current.url' placeholder="for example: http://localhost:8080" ng-pattern="/^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/" required></input>
+		<input class="gf-form-input max-width-21" type="text" ng-model='current.url' placeholder="for example: http://localhost:8081" ng-pattern="/^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/" required></input>
 
 		<info-popover>
 			<p>Specify a complete HTTP url (http://your_server:8080)</p>