Drop two retired Microsoft links, keep the reference text

The Microsoft KB 321788 page and the MSDN forum post (both 404, no
archive snapshot) are unlinked while keeping the surrounding prose. Also
drops the dead SVN $Revision$ marker from the file.

Author: lacatoire

install/windows/commandline.xml

@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision$ -->
 <sect1 xml:id="install.windows.commandline" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <title>Running PHP on the command line on Windows systems</title>
  <para>
@@ -177,13 +176,10 @@ Windows Registry Editor Version 5.00
 "InheritConsoleHandles"=dword:00000001
 ]]>
    </screen>
-   Further information regarding this issue can be found in this <link
-   xlink:href="http://support.microsoft.com/default.aspx?scid=kb;en-us;321788">Microsoft
-   Knowledgebase Article : 321788</link>.
+   Further information regarding this issue can be found in Microsoft
+   Knowledgebase Article 321788.
    As of Windows 10, this setting seems to be reversed, making the default install of
-   Windows 10 support inherited console handles automatically. This <link
-   xlink:href="https://social.msdn.microsoft.com/Forums/en-US/f19d740d-21c8-4dc2-a9ab-d5c0527e932b/nasty-file-association-regression-bug-in-windows-10-console?forum=windowssdk">
-   Microsoft forum post</link> provides the explanation.
+   Windows 10 support inherited console handles automatically.
   </para>
  </note>
 </sect1>