andle_fwd.hpp, as it&#39;s such a thin wrapper around an FD (int) that there&#39;s no point</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="comment"> * forward-declaring it, as it&#39;s ~always referred to by value. */</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment"></span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="