title: Gerrit send underscore to Uploading Changes message
body: <p>we're using gerrit 2.14, I'm trying to send a message with my push to trigger jenkins.
  problem is that I need to write bla_bla, but when I do:</p>
  <pre><code>git push ssh://link.to.repo/my_repo HEAD:refs/for/master%message=bla_bla
  </code></pre>
  <p>the message is &quot;bla bla&quot;
  I've tried percent encoding, but then the message is &quot;bla%f5bla&quot;</p>
  <p>Any ideas? old gerrit version? something I can do?</p>