Fixed psl implementation.

[smeinecke]

Public Suffix List is NOT puny encoded, so as noted in the "publicsuffix"
module:

Note that for internationalized domains the list at http://publicsuffix.org
uses decoded names, so it is up to the caller to decode any Punycode-encoded
names.

• Add check if host is puny encoded and decode + reencode result of psl.

[neilmb]

Could you add a test case to test.py that exercises this code path? In the test_pld method, you could add an example with a punycoded domain and the resulting PLD.

[smeinecke]

There seems to be another big problem as the TLD 'xn--e1a4c' is not recognized by the publicsuffix module. It seems as the default shipped public suffix list is very out of date which is a big problem as nearly every month new TLDs get delegated.

[dlecocq]

I think this is obviated by #45 -- @smeinecke - could you confirm it meets your needs? (I specifically grabbed your test cases with that hope)

[smeinecke]

@dlecocq yes, that's great, thanks 👍