title: git doesn't work behind proxy since version 1.7.9
body: <p>Since git 1.7.9 I haven't been able to clone, fetch, or push to repositories through a proxy server. It works well with version 1.7.8, but newer versions, including the latest version, throw this error:</p>
  
  <pre><code>error: Failure when receiving data from the peer while accessing http://github.com/...
  fatal: HTTP request failed
  </code></pre>
  
  <p>I have set http.proxy property in git config, which was sufficient in 1.7.8. The only way I was able to get newer versions of git running was to use cntlm.</p>
  
  <p>What am I doing wrong?</p>