[Patches] [Patch #101257] Update test cases for posixpath, ntpath, add dospath test

[Skip Montanaro]

    Thomas> Uhm, why is this change uploaded ? You already broke the test
    Thomas> cases (at least, as far as I can tell: I was testing two patches
    Thomas> and test_posixpath is failing for me. Wasn't the policy that no
    Thomas> checking should leave failing tests ?

Dunno.  I told Tim & Guido that's how I was going to do it.  Neither one
complained.  I assume this will pass through the system fairly quickly and
be checked in later today.

Skip