title: 'Yarn install' cause 'trouble with network connection'
body: <pre><code>yarn install v0.21.3
  [1/4] Resolving packages...
  warning There appears to be trouble with your network connection. Retrying...
  warning There appears to be trouble with your network connection. Retrying...
  warning There appears to be trouble with your network connection. Retrying...
  warning There appears to be trouble with your network connection. Retrying...
  warning There appears to be trouble with your network connection. Retrying...
  error An unexpected error occurred: "https://github.com/igorklopov/node-resolve.git: tunneling socket could not be established, cause=write EPROTO 140399640340352:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:../deps/openssl/openssl/ssl/s23_clnt.c:794:\n".
  </code></pre>
  
  <p>First i thought that this may be proxy issue
  So I've added my corporate proxy settings:</p>
  
  <pre><code>yarn config set proxy http://proxy.dvfu.ru:3128
  yarn config set https-proxy https://proxy.dvfu.ru:3128
  </code></pre>
  
  <p>But nothing happened, still have the error above.</p>