[#A63567DDE5556963408B1CE43C110213E94A0724]
Normalize the URL path
url_base& normalize_path();
Applies Syntax-based normalization to the URL path.
Percent-encoding triplets are normalized to uppercase letters. Percent-encoded octets that correspond to unreserved characters are decoded. Redundant path-segments are removed.
Strong guarantee. Calls to allocate may throw.