Wildcard and quoting handling are not correct in Windows

[tagomoris]

Backslashes are handled as quoting character in path of in_tail. But backslashes are also path separator in Windows environment, and it is not determined automatically whether a backslash is separator or quoting character.

We should have a way to handle it correctly in Windows environment. Options:

• add a configuration parameter not to extract globs and handle backslashes as path separators always