Percent-encoded hosts

[decorator-factory]

Is it intentional that the host part of the URL is not percent-decoded? For example:

>>> yarl.__version__
'1.22.0'
>>> URL('http://%d0%b1%d0%b0%d0%bd%d0%b0%d0%bd.com')
URL('http://%d0%b1%d0%b0%d0%bd%d0%b0%d0%bd.com')
>>> _.host
'%d0%b1%d0%b0%d0%bd%d0%b0%d0%bd.com'
>>> URL('http://банан.com')
URL('http://xn--80aab3cb.com')
>>> _.host
'банан.com'
>>>

According to RFC 3986:

The reg-name syntax allows percent-encoded octets in order to represent non-ASCII registered names in a uniform way that is independent of the underlying name resolution technology. Non-ASCII characters must first be encoded according to UTF-8 [STD63], and then each octet of the corresponding UTF-8 sequence must be percent-encoded to be represented as URI characters. URI producing applications must not use percent-encoding in host unless it is used to represent a UTF-8 character sequence.

Here's how some other URL parsing libraries behave:

• furl.furl("http://%d0%b1%d0%b0%d0%bd%d0%b0%d0%bd.com") raises an exception (clearly a bug IMO)
• Rust's url package successfully parses the host as банан.com (and returns the punycoded host name)
• JavaScript's URL does the same as the Rust's url and decodes банан.com (following the URL Standard)

> URL.parse("http://банан.com").host
'xn--80aab3cb.com'
>