Poor man's UI for http method filtering + other minor fixes

The UI is just a start (the idea was to get the barely working implementation out there and see how it holds up -- the whole "method filtering" thing might be utterly useless to others).

Other minor fixes:
* added a try block around http method parsing in parse_vhosts() to avoid the occasional "list index out of range" errors
* added missing check for /etc/aptop.conf (was mentioned in the comment but no code handled it)