python3-url-normalize (URL normalization for Python)

URI Normalization function:

 -Take care of IDN domains.
 -Always provide the URI scheme in lowercase characters.
 -Always provide the host, if any, in lowercase characters.
 -Only perform percent-encoding where it is essential.
 -Always use uppercase A-through-F characters when percent-encoding
 -Prevent dot-segments appearing in non-relative URI paths.
 -For schemes that define a default authority, use an empty
  authority if the default is desired.
 -For schemes that define an empty path to be equivalent to a path
  of "/", use "/".
 -For schemes that define a port, use an empty port if the default
  is desired
 -All portions of the URI must be utf-8 encoded NFC from Unicode
  strings

Inspired by Sam Ruby's urlnorm.py