Type"><code>FormatMediaType</code></a> function
of the <code>mime</code> package has  been simplified to make it
consistent with
<a href="/pkg/mime/#ParseMediaType"><code>ParseMediaType</code></a>.
It now takes <code>"text/html"</code> rather than <code>"text"</code> and <code>"html"</code>.
</p>

<p>
<em>Updating</em>:
What little code is affected will be caught by the compiler and must be updated by hand.
</p>

<h3 id="net">The net package</h3>

<p>
In Go 1, the various <code>SetTimeout</code>,
<code>SetR