[MERGE] better support of unicode paths on Windows

[Alexander Belchenko]

John Arbash Meinel пишет:
> Alexander Belchenko wrote:
>> Bzr has one latent bug related to create new .bzr directory inside
>> unicode directory. The problem occurs when unicode path cannot be
>> encoded in current user encoding, as pointed by INADA Naoki, see
>> https://bugs.launchpad.net/tortoisebzr/+bug/335362/comments/41
>>
>> This is rare condition, but bug itself is very serious.
>> Please, merge for 1.17.
>>
> 
> You will need to add:
> 
> self.requireFeature(UnicodeFeature) (something likethat)
> so that the test will skip properly when LANG=C

John,

This is windows-specific code. There is no such thing as LANG=C.
Windows filesystem is always unicode-aware IIUC.