Normalize the URL authority
Applies Syntax-based normalization to the URL authority.
The host is normalized to lowercase. Percent-encoding triplets are normalized to uppercase letters. Percent-encoded octets that correspond to unreserved characters are decoded.
assert( url( "http://www.Example.com" ).normalize_authority().buffer() == "http://www.example.com" );
assert( url( "http://www.%65xample.com" ).normalize_authority().buffer() == "http://www.example.com" );
Strong guarantee. Calls to allocate may throw.
*this