Unsupported URL scheme error, how to use "https" CRAN mirrors in R 3.2.4?
<p>When I run <code>install.packages("packagename")</code> I get prompted to choose a CRAN mirror.</p>

<ul>
<li><p>If I choose a https mirror the following error message comes up:</p>

<pre><code>unsupported URL scheme 
</code></pre></li>
<li><p>If I choose a http mirror (choice 22), installation goes on without this warning.</p></li>
</ul>

<p>How do I make <code>install.packages()</code> support <code>https</code> mirrors?</p>

<p>I'm using a 32 bit version of R if that is of any importance.</p>