Fix incorrect description of request stream in Chapter 20

Closes marijnh#560

Author: marijnh

20_node.md

@@ -994,8 +994,8 @@ outcome of calling `pipe`.
 
 When something goes wrong when opening the file, `createWriteStream`
 will still return a stream, but that stream will fire an `"error"`
-event. The output stream to the request may also fail, for example if
-the network goes down. So we wire up both streams' `"error"` events to
+event. The stream from the request may also fail, for example if the
+network goes down. So we wire up both streams' `"error"` events to
 reject the promise. When `pipe` is done, it will close the output
 stream, which causes it to fire a `"finish"` event. That's the point
 where we can successfully resolve the promise (returning nothing).

html/errata.html

@@ -114,6 +114,10 @@ <h2>Chapter 19</h2>
 
 <h2>Chapter 20</h2>
 
+<p><strong>Page 367</strong> <em>A File Server</em>: The part that
+talks about “the output stream to the request” should say “the stream
+from the request” instead.</p>
+
 <p><strong>Page 369</strong> (1st) <em>Directory
 Creation</em>: <code>MKCOL</code> stands for “make collection”, not “make
 column” as the book claims.</p>