Firewall ports open for reverse proxy

[leenaars]

Currently, the user needs to indicate manually in the configuration that port 80 and port 443 need to be opened. However, if the reverse proxy is used, this implies that those ports are to be opened.

Proposed solution:
Add ports 80 and 443 firewall rules when reverse proxy is active.

[qknight]

this has been fixed in 6d83eea and we now add the respective ports to the firewall by default as wished.