httpserver: Fix issue with Python 2 if no favicon is set.
Add supybot.utils.net.getAddressFromHostname() and improve Socket driver to try successively all IP addresses.
httpserver: Fix restarting the server once a plugin has been unloaded and loaded back.
httpserver: Fix design.
httpserver: Fix Content-type of default.css which caused the stylesheet not to be applied.
httpserver: Explicitely define the charset.
Factoids: Fix XHTML validation of the web interface.