nto a sequence of 1+ buffers on a connected stream socket, continuing until either the entire sequence is fully filled to the byte; or an error (not counting would-block, which just means keep trying to make progress when possible). We act exactly the same with the following essential differences being the exceptions:</p><ul>
<li>The target buffer is determined once system indicates at least 1 byte of data is available to actually read off socket; it's not supplied as an arg.<ul>
<li>To determine it, we cal