[Bug-wget] Separator problem

[Dmitry Bogatov]

In my previous patch(not applied yet), I refactored some code,
but did not fixed mistake in this line:

  sprintf (path, "%s/%s", home, NETRC_FILE_NAME);

Unfortunately, we do not live in a perfect world, and there is OS,
where separator is different. There is already code for getting
separator for DOS-like systems, based on parsing `argv0'.
But it introduce static variables and other ugly things.

Any other, more beatiful solution? I find strange, that GNU project
deals with this OS zoo, and do not have public portability layer.

--
Best regards, Dmitry Bogatov.
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