Case handling on windows

[Andrei Vermel]

Matt,

I think the way current tip handles case changes on windows is not quite
right. At the moment it silently ignores them.

D:\distribs\mercurial\qqq>hg init

D:\distribs\mercurial\qqq>echo "aaa" >aaa.txt

D:\distribs\mercurial\qqq>hg add
adding aaa.txt

D:\distribs\mercurial\qqq>hg ci -m 1

D:\distribs\mercurial\qqq>mv aaa.txt AAA.txt

D:\distribs\mercurial\qqq>ls
AAA.txt

D:\distribs\mercurial\qqq>hg stat

D:\distribs\mercurial\qqq>echo "bbb" >>aaa.txt

D:\distribs\mercurial\qqq>hg stat
M aaa.txt

I hope that this behaviour is not the intended one?
I think it would be much more appropriate, if stat reported the case changes
just like on any other platform. 

Also, 'add' is acting silly: 

D:\distribs\mercurial\qqq>ls
AAA.txt

D:\distribs\mercurial\qqq>hg add aaa.txt
aaa.txt already tracked!

D:\distribs\mercurial\qqq>hg add AAA.txt

D:\distribs\mercurial\qqq>hg add Aaa.txt

D:\distribs\mercurial\qqq>hg add qqq.txt
qqq.txt does not exist!

Best Regards,

Andrei