I'm trying to find the formal definition of 'custom request header'. The term isn't defined, and rfc2616 doesn't define it either. Is it just a header that isn't in the list of simple request headers?
It has been renamed a while ago. http://dvcs.w3.org/hg/cors/raw-file/tip/Overview.html#author-request-headers -- Anne van Kesteren http://annevankesteren.nl/
