<p>It proved not to be complex, just a matter of the current config grammar. Even with the old versions you can set the port to <code>0</code> and then it should not appear in the headers.</p>
<p>Anyhow, I pushed also a commit that allows advertise with host only, being an alias to <code>... advertise host:0</code>. When listing the sockets via rpc, the port 0 will appear, but in headers should be no port.</p>
<p>I did basic testing, if it does not work, reopen this issue.</p>

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