http headers / caching

[mnico...@gmail.com]

Hello Peter,

Except to the server-side caching, is it possible to affect the http header/caching?
In details, how we could set expiration headers or unset etags for specific URIs?
Some examples are:

- Set expiration header today + 30 days for all css or js files
- Remove etags for all images
- Add custom headers similar to the existing "Mode: debug"


Thank you,
Nikolaos