h2oでCORSに対応する

user : root
listen: 8080
hosts:
  default:
    path:
      /:
        file.dir: /home/vagrant/h2o_doc_root
        access-log: /home/vagrant/h2o_log/log
        header.add: "Access-Control-Allow-Credentaial:true"
        header.add: "Access-Control-Allow-Headers:Accept, X-Access-Token, X-Application-Name, X-Request-Sent-Time"
        header.add: "Access-Control-Allow-Methods:GET,POST,OPTIONS"
        header.add: "Access-Control-Allow-Origin:*"

説明は後日追記。