title: How to use multiple ReplacePathRegex rules in annotation
body: <p>Im trying to figure out how to use multiple rules in my ingress object.</p>
  
  <p>Here is an example of what im trying to do. Doing it in multiple lines doesn't work, as the next rule overwrites the previous one. So only the last rule works. </p>
  
  <pre><code>apiVersion: extensions/v1beta1
  kind: Ingress
  metadata:
    annotations:
      external-dns.alpha.kubernetes.io/hostname: myhost.mydomain.tld
      external-dns.alpha.kubernetes.io/target: traefik-int.mydomain.tld
      kubernetes.io/ingress.class: traefik-internal
      traefik.ingress.kubernetes.io/request-modifier: "ReplacePathRegex:/aaa /xxx"
      traefik.ingress.kubernetes.io/request-modifier: "ReplacePathRegex:/bbb /yyy"
      traefik.ingress.kubernetes.io/request-modifier: "ReplacePathRegex:/ccc/(.*)/ /$1/zzz/"
    generation: 1
    labels:
      app: myapp
      heritage: Tiller
      release: tools
    name: myapp
    namespace: tools
  spec:
    rules:
    - host: myhost.mydomain.tld
      http:
        paths:
        - backend:
            serviceName: myservice
            servicePort: 8000
          path: /
  status:
    loadBalancer: {}
  </code></pre>
  
  <p>So how do I build an ingress object with several rules?</p>