HTTP Strict Transport Security para sitio web

Para conseguir disponer de HTTP Strict Transport Security  en este test:

https://www.ssllabs.com/ssltest/analyze.html

Editar en el .htaccesss del sitio web:

# Guarantee HTTPS for 1 Year including Sub Domains
Header always set Strict-Transport-Security «max-age=31536000; includeSubDomains»