Return the host
<include/boost/url/authority_view.hpp>
pct_string_view
encoded_host() const noexcept;
This function returns the host portion of the authority as a string, or the empty string if there is no authority. The returned string may contain percent escapes.
assert( url_view( "https://www%2droot.example.com/" ).encoded_host() == "www%2droot.example.com" );
host = IP-literal / IPv4address / reg-name
IP-literal = "[" ( IPv6address / IPvFuture ) "]"
reg-name = *( unreserved / pct-encoded / "-" / ".")