doc/go1.17: mention new Windows SysProcAttr fields

For #44011
For #44513

Change-Id: I512466f2e775e36098eb36ca7ef82333cd9e632a
Reviewed-on: https://go-review.googlesource.com/c/go/+/323352
Trust: Ian Lance Taylor <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: ianlancetaylor

doc/go1.17.html

@@ -611,6 +611,15 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
       On Unix-like systems, the process group of a child process is now set with signals blocked.
       This avoids sending a <code>SIGTTOU</code> to the child when the parent is in a background process group.
     </p>
+
+    <p><!-- CL 288298, CL 288300 -->
+      The Windows version of
+      <a href="/pkg/syscall/#SysProcAttr"><code>SysProcAttr</code></a>
+      has two new fields. <code>AdditionalInheritedHandles</code> is
+      a list of additional handles to be inherited by the new child
+      process. <code>ParentProcess</code> permits specifying the
+      parent process of the new process.
+    </p>
   </dd>
 </dl><!-- syscall -->