filelify shouldn't always escape dots.

filelify shouldn't always escape dots.

Follow-up to a9fac63d75d9222a73fbf511ca58ae1d66cbf9a7.  It turns
out that the CRTL doesn't handle the escapes when the path is in
Unix syntax (even though it requires them in native syntax).

  stat('foo/bar.baz.dir;1')

is ok, but

  stat('foo/bar^.baz.dir;1')

fails.  So skip the escaping if there is a slash anywhere in the
path.