protected void copyProxyCookie(HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse, String headerValue) {
    for (HttpCookie cookie : HttpCookie.parse(headerValue)) {
      Cookie servletCookie = createProxyCookie(servletRequest, cookie);
      servletResponse.addCookie(servletCookie);
    }
  }
Copy cookie from the proxy to the servlet client.
Replaces cookie path to local path and renames cookie to avoid collisions.
src/main/java/org/mitre/dsmiley/httpproxy/ProxyServlet.java