Add check for WP-Super-Cache

Author: jvazquez-r7

modules/exploits/unix/webapp/php_wordpress_total_cache.rb

@@ -238,7 +238,7 @@ def check
 			end
 		end
 
-		if res.body and res.body =~ /Performance optimized by W3 Total Cache/
+		if res.body and (res.body =~ /Performance optimized by W3 Total Cache/ or res.body =~ /Cached page generated by WP-Super-Cache/)
 			return Exploit::CheckCode::Detected
 		end