tor</code> and a <code>version</code>.  The set
of primitive <code>operators</code> is:</p>
<ul>
<li><code>&lt;</code> Less than</li>
<li><code>&lt;=</code> Less than or equal to</li>
<li><code>&gt;</code> Greater than</li>
<li><code>&gt;=</code> Greater than or equal to</li>
<li><code>=</code> Equal.  If no operator is specified, then equality is assumed,
so this operator is optional, but MAY be included.</li>
</ul>
<p>For example, the comparator <code>&gt;=1.2.7</code> would match the versions
<code>1.2.7