The _docs_ say it returns 0 for failure, non-zero for success.
This implementation is looking for <0 as HRESULT failure, and deriving
an Errno from that.
The new tests fail with GetFileSystemType as it was defined, e.g.,
```
--- FAIL: TestGetFSTypeOfValidButAbsentDrive (0.00s)
fs_windows_test.go:41: GetFileSystemType a:\ unexpectedly succeeded
```
when I definitely do not have an A:\ drive.
Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
Since Go 1.6, archive/tar has gained public support for custom PAX
Records, so there's no need to maintain a fork of this library anymore.
We do end up with a fork of the PAX timestamp parsing/formatting
functions, but they are much less likely to change.
Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
Paul "TBBle" Hampson