title: Is it possible to add custom headers to a ServiceStack Redis message?
body: <p>When a message is sent to Redis using ServiceStack, the framework adds all the standard headers (<code>Priority</code>, <code>CreatedDate</code>, ...). However, is it possible to add any custom headers to that message? I've got a set of microservices that pass messages amongst each other, and I'd like to include a shared header.</p>
  
  <p>So far, I have explored implementing my own version of IMessage or IMessageFactory, and I've looked at the different properties within <code>RedisMqServer</code> when boostrapping it in the IOC container, but I have yet to find anywhere I can add a new header.</p>
  
  <p>Thanks in advance!</p>