Merge pull request #2133 from gravitl/refactor_auto_update

Add host level auto update setting with default true

logic/hosts.go

@@ -97,6 +97,7 @@ func CreateHost(h *models.Host) error {
 		return err
 	}
 	h.HostPass = string(hash)
+	h.AutoUpdate = servercfg.AutoUpdateEnabled()
 	// if another server has already updated proxyenabled, leave it alone
 	if !h.ProxyEnabledSet {
 		log.Println("checking default proxy", servercfg.GetServerConfig().DefaultProxyMode)