doc/1.9: add CL 44074 for net/http to the release notes

Change-Id: I2eb4f9531372c792a98578560e946d803ad96da8
Reviewed-on: https://go-review.googlesource.com/54411
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>

doc/go1.9.html

@@ -724,6 +724,11 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
         header when matching handlers. The host is matched unmodified for <code>CONNECT</code> requests.
       </li>
 
+      <li><!-- CL 44074 -->
+        The new <a href="/pkg/net/http/#Server.ServeTLS"><code>Server.ServeTLS</code></a> method wraps
+        <a href="/pkg/net/http/#Server.Serve"><code>Server.Serve</code></a> with added TLS support.
+      </li>
+
       <li><!-- CL 34727 -->
         <a href="/pkg/net/http/#Server.WriteTimeout"><code>Server.WriteTimeout</code></a>
         now applies to HTTP/2 connections and is enforced per-stream.