e17:  manage xembed windows as long as they are not override_redirect.
e17:  manage xembed windows as long as they are not override_redirect.

- might fix urxvt tabs, might break other stuff


git-svn-id: 6ac5796aeae0cef97fb47bcc287d4ce899c6fa6e@59346 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

jordemort/e17,jordemort/e17,jordemort/e17