Return the host name
<include/boost/url/authority_view.hpp>
pct_string_view
encoded_host_name() const noexcept;
If the host type is host_type::name , this function returns the name as a string. Otherwise, if the host type is not an name, it returns an empty string. The returned string may contain percent escapes.
assert( url_view( "https://www%2droot.example.com/" ).encoded_host_name() == "www%2droot.example.com" );
host = IP-literal / IPv4address / reg-name
IP-literal = "[" ( IPv6address / IPvFuture ) "]"
reg-name = *( unreserved / pct-encoded / "-" / ".")