case insensitive headers

[vartan]

I understand HTTP header names are case-insensitive (RFC 2616). I'm currently interacting with an API that does not follow protocol, it works via node's https but not browserify's.

If you want complete compatibility with node, I'd say remove the case insensitivity. Otherwise, if you want to just follow the spec, I understand.

In the meantime, I've been able to get my API working, by modifying the browserify source code to remove the tolowercase for the headers