[Bug-wget] Recursive wget with URL filter/under certain (non-parent) directory?

[Yang Zhang]

Is it possible to start at http://host/foo/bar/baz/index.cgi?page=1
and recursively fetch any content under http://host/foo/? (Can't start
at http://host/foo/ since that's not a valid page.) I looked at the
various options to control what wget recursive fetches, such as
--no-parent and --include-directories, but I can't seem to find an
option to accomplish the above, e.g. a simple URL substring filter.
Thanks in advance.