Adrian Buehlmann <adrian@cadifra.com> [Tue, 11 Jan 2011 14:10:16 +0100] rev 13280
reintroduces util.unlink, for POSIX and Windows.
windows: factor it out of rename
posix: add alias 'unlink' for os.unlink
Note that this new unlink function now has different semantics than the
unlink() we had before changeset 6bf39d88c857 ("rename util.unlink to
unlinkpath").