Added security headers

lib/wpscan/wp_target/interesting_headers.rb

@@ -30,6 +30,12 @@ class WpTarget < WebSite
         Vary
         Cache-Control
         X-Pingback
+        Strict-Transport-Security
+        X-Frame-Options
+        X-XSS-Protection
+        X-Content-Type-Options
+        X-WebKit-CSP
+        Content-Security-Policy
       }
     end