EdgeCast - Override origin cache control

Sometimes the the origin does not send proper cache control headers, and often you want to override it at the edge cache. 

You need a Rules Engine package, and there are 2 values to set: 
* Internal Max Age (TTL) defines how long the Edgecast cache is to hold unto an object. This value is not passed on to the end user. 
* External Max Age defines how long a browser should keep an object in local browser cache. 

In this example, the internal cache is set to 3 days, the browser cache is set to 2 hours, and the edge is instructed to ignore any cache control headers coming out of the origin.