1, URL address management allows for black/whitelisting urls. Wildcards are supported. The primary role of Web Control is to filter URLs by category. To create an exception for a particular URL blocked by a category, you'll need to do it via a Web Control rule. Web Control doesn't support wildcards.
2, You can whitelist the main URL, however, in order to allow access to all other URLs it loads you'd need to do it for each URL manually.
3, Web access protection scans HTTP(S) on default ports 80, 8080 and 443. The HTTPS scanner filters only SSL communication of browsers. I don't think that RDP or printers communicate via HTTP on port 80.
