GA: Anonymize IPs and use https for the GA script.

docs/4.0/components/input-group/index.html

@@ -59,6 +59,7 @@
   m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
   })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
   ga('create', 'UA-146052-10', 'getbootstrap.com');
+  ga('set', 'anonymizeIp', true);
   ga('send', 'pageview');
 </script>