Update hostsfile and add zerotier cookbook

cookbooks/zerotier/recipes/ohai_plugin.rb

@@ -0,0 +1,15 @@
+#
+# Cookbook:: zerotier
+# Recipe:: ohai_plugin
+#
+# Copyright:: 2017, ZeroTier, Inc., All Rights Reserved.
+
+ohai_plugin 'zerotier_ohai' do
+    compile_time false
+    resource :template
+    variables ({
+        :zerotier_binary => node['zerotier']['binary'],
+        :control_port => node['zerotier']['control_port'],
+        :data_dir => node['zerotier']['data_dir']
+    })
+end