Parses a path to determine if it is a directory root
_WinAPI_PathIsRoot ( $sFilePath )
|$sFilePath||The path to be validated.|
|True:||the path is a root.|
|False:||the path is not a root.|
Returns True for paths such as "\", "X:\" or "\\server\share". Paths such as "..\path2" or "\\server\" return False.
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