title: R install.packages picks up wrong binary
body: <p>I do this:</p>
  
  <pre><code>options(repos = "http://corpserver.ru/r/")
  install.packages("zoo")
  </code></pre>
  
  <p>and get the error:</p>
  
  <pre><code>... cannot open URL "http://corpserver.ru/r/bin/windows/contrib/3.4/zoo_1.8-
  1.zip": HTTP status was '404 Not Found'
  </code></pre>
  
  <p>though there is no <code>zoo_1.8-1.zip</code> in <code>bin/windows/contrib/3.4/</code> folder on the server --- but there is <code>zoo_1.8-0.zip</code> (with zero at the end). So how to persuade R to install the package?</p>