uri‘s host. This will never have
unless it is non-UTF-8 (which can only be the case if
uri contained an IPv6 address literal, this value will be just
that address, without the brackets around it that are necessary in
the string form of the URI. Note that in this case there may also
be a scope ID attached to the address. Eg,
fe80::1234%``25em1 if the string is still encoded).