Fix dead external links in the English manual (#5664)

* Fix two dead external links

reference/ldap/constants.xml: &url.rfc;45282 had an extra digit (link
text reads RFC 4528). reference/mongodb/architecture.xml: remove the
double slash in the Composer package link.

* 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.

Author: lacatoire

install/windows/commandline.xml

@@ -177,13 +177,10 @@ 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>

reference/ldap/constants.xml

@@ -558,7 +558,7 @@
    </term>
    <listitem>
     <simpara>
-     Control Constant - Assertion (<link xlink:href="&url.rfc;45282">RFC 4528</link>).
+     Control Constant - Assertion (<link xlink:href="&url.rfc;4528">RFC 4528</link>).
      Available as of PHP 7.3.0.
     </simpara>
    </listitem>

reference/mongodb/architecture.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-
 <chapter xml:id="mongodb.architecture" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <titleabbrev>Driver Architecture and Internals</titleabbrev>
  <title>Explains the driver architecture, and special features</title>
@@ -34,7 +33,7 @@
    At the top of this stack sits a
    <link xlink:href="&url.mongodb.library;">PHP library</link>,
    which is distributed as a
-   <link xlink:href="&url.packagist.package;/mongodb/mongodb">Composer package</link>.
+   <link xlink:href="&url.packagist.package;mongodb/mongodb">Composer package</link>.
    This library provides an API consistent with other MongoDB
    <link xlink:href="&url.mongodb.drivers;">drivers</link>
    and implements various cross-driver