Make other flask session cookies secure

roles/kerneltest/templates/kerneltest.cfg

@@ -32,6 +32,9 @@ MAX_CONTENT_LENGTH = 1024 * 10
 # This is required to fix login
 PREFERRED_URL_SCHEME='https'
 
+# Make browsers send session cookie only via HTTPS
+SESSION_COOKIE_SECURE = True
+
 {% if env == 'staging' %}
 FAS_OPENID_ENDPOINT = 'https://id.stg.fedoraproject.org/'
 {% endif %}