[web] set proper Cache-Control header for static files
- set Cache-Control max-age to match Expires
- use the max_age method (defaults to 1 week) instead of hardcoded 6
months
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html