web: make dynamically-generted content non-cacheable
web: make dynamically-generted content non-cacheable

Add headers to prevent any kind of storing or caching
at the browser side.

Signed-off-by: Ilija Hadzic <47a09d4a4430975766160361f65fc72633be50b6@gmail.com>

ihadzic/jim,ihadzic/jim,ihadzic/jim