Set Adobe's preferred crossdomain.xml Content-Type
Set Adobe's preferred crossdomain.xml Content-Type

This is pedantic but matches the preferred value at https://www.adobe.com/devnet-docs/acrobatetk/tools/AppSec/xdomain.html#policy-file-host-basics and what's sent in the wild by https://www.adobe.com/crossdomain.xml
evansd/whitenoise,evansd/whitenoise,evansd/whitenoise