For sake of ease of use, converted to boolean functions that just assume "false"
in case of errors.
Note: Mozilla makes special arrangements for .onion addresses as well but
we explicitly do not adopt that. TOR browser can do that all day if it wants.
Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
