title: Pushing with mercurial: abort: no username supplied (see "hg help config")
body: <p>I'm not sure why but since today I have the problem with pushing my source to repo. 
  I got <code>abort: no username supplied (see "hg help config")</code>
  The thing is that I have <code>[ui]</code> section in hgrc:</p>
  
  <pre><code>[ui]
  username = My username
  verbose = true
  </code></pre>
  
  <p>Where's the problem then?</p>