=== 2.9 ===

* Update to the latest version of MathJax setting "httpurl" and "httpsurl" to:
  http://cdn.mathjax.org/mathjax/2.5-latest/MathJax.js

  and

  https://cdn.mathjax.org/mathjax/2.5-latest/MathJax.js

=== Before 2.9 ===

Setting "httpsurl" default changed from:

https://c328740.ssl.cf1.rackcdn.com/mathjax/2.3-latest/MathJax.js

to:

https://cdn.mathjax.org/mathjax/2.3-latest/MathJax.js
