v3.2.0

• Enhance CSP policy [f48934b]
• Common headers addition based on MIME-types instead of file extensions [a880772...64cb33d]
• Always unset X-Powered-By header [1470258]
• Support hashed asset names in cache-busting [33f8006]
• Switch application/vnd.geo+json to application/geo+json [35cbd63]
• New test system using server-configs-test [3ae257c]
• Improve inline comments.