Wrong explicitly specified port normalization

[KirillArtemenko]

Hi, nice normalizer, but in main example we see:

from url_normalize import url_normalize
print(url_normalize('www.foo.com:80/foo'))
https://www.foo.com/foo

But, wait a minute...
HTTP port is 80
HTTPS port is 443
Normalize the explicitly specified ":80" port to "https://" is incorrect — it must be "http://"