docs(user-guide) Add docs for CORS and HTTP Security Headers policies
docs(user-guide) Add docs for CORS and HTTP Security Headers policies

apiman/apiman,msavy/apiman,msavy/apiman,apiman/apiman,apiman/apiman,apiman/apiman-guides,msavy/apiman,apiman/apiman,apiman/apiman,msavy/apiman,msavy/apiman