URL category-based security with unified policies

The unified policies feature is enhanced to include URL categories as match criteria for traffic flowing through the firewall. The URL category for Web filtering enables redirecting the traffic based on configured URL Category policy for further processing on devices. URL categories can be configured for unified policies with or without dynamic-application applied. A URL category can be configured as url-category any and url-category none. If url-category is not configured, the functionality is similar to url-category none.