Adds asio library and Storage Module

lib/asio-1.18.0/doc/asio/reference/basic_socket/close/overload2.html

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+<div class="titlepage"><div><div><h5 class="title">
+<a name="asio.reference.basic_socket.close.overload2"></a><a class="link" href="overload2.html" title="basic_socket::close (2 of 2 overloads)">basic_socket::close
+          (2 of 2 overloads)</a>
+</h5></div></div></div>
+<p>
+            Close the socket.
+          </p>
+<pre class="programlisting">void close(
+    asio::error_code &amp; ec);
+</pre>
+<p>
+            This function is used to close the socket. Any asynchronous send, receive
+            or connect operations will be cancelled immediately, and will complete
+            with the <code class="computeroutput">asio::error::operation_aborted</code> error.
+          </p>
+<h6>
+<a name="asio.reference.basic_socket.close.overload2.h0"></a>
+            <span><a name="asio.reference.basic_socket.close.overload2.parameters"></a></span><a class="link" href="overload2.html#asio.reference.basic_socket.close.overload2.parameters">Parameters</a>
+          </h6>
+<div class="variablelist">
+<p class="title"><b></b></p>
+<dl>
+<dt><span class="term">ec</span></dt>
+<dd><p>
+                  Set to indicate what error occurred, if any. Note that, even if
+                  the function indicates an error, the underlying descriptor is closed.
+                </p></dd>
+</dl>
+</div>
+<h6>
+<a name="asio.reference.basic_socket.close.overload2.h1"></a>
+            <span><a name="asio.reference.basic_socket.close.overload2.example"></a></span><a class="link" href="overload2.html#asio.reference.basic_socket.close.overload2.example">Example</a>
+          </h6>
+<pre class="programlisting">asio::ip::tcp::socket socket(my_context);
+...
+asio::error_code ec;
+socket.close(ec);
+if (ec)
+{
+  // An error occurred.
+}
+</pre>
+<h6>
+<a name="asio.reference.basic_socket.close.overload2.h2"></a>
+            <span><a name="asio.reference.basic_socket.close.overload2.remarks"></a></span><a class="link" href="overload2.html#asio.reference.basic_socket.close.overload2.remarks">Remarks</a>
+          </h6>
+<p>
+            For portable behaviour with respect to graceful closure of a connected
+            socket, call <code class="computeroutput">shutdown()</code> before closing the socket.
+          </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
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