How to configure proxy for multiple protocols

[Hugo Palma]

I'm trying to use the same proxy for both http and https but i'm having no
success.
I've tried configuring like this:

<proxies>
    <proxy>
      <id>myhttp</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>192.168.0.4</host>
      <port>8080</port>
    </proxy>

    <proxy>
      <id>myhttps</id>
      <active>true</active>
      <protocol>https</protocol>
      <host>192.168.0.4</host>
      <port>8080</port>
    </proxy>
  </proxies>

But only the first proxy is used. I also tried using the same id for both
proxies with no success.
Any ideas ?

Thanks.