Doc: Update Microsoft's Documentation Links

The documentation links on `msdn.microsoft.com` now redirect to
`docs.microsoft.com`.

While the redirection works, our script to catch broken links on
dev-snapshots builds of the documentation doesn't handle redirection
correctly, reporting it as broken.

Both to appease the broken-links script and to avoid an unneccesary
redirection, the links were modified to point to the equivalent address
in the new domain.

Furthermore, the link to the `Winsock 2 Socket Handle` was moved to be
an `\externalpage` link, as it was used in two different places.

Additionally, the `\externalpage` link titled `Dirext X SDK` was removed
as it was not used in any part of the documentation.

Task-number: QTBUG-96127
Pick-to: 6.2 6.2.0
Change-Id: I07f0ae8d610a7f8322b892a2fa37a5cc1769289e
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

doc/global/externalsites/external-resources.qdoc

@@ -233,8 +233,8 @@
 */
 
 /*!
-    \externalpage http://msdn.microsoft.com/en-us/directx/default.aspx
-    \title Direct X SDK
+    \externalpage https://docs.microsoft.com/en-us/windows/win32/winsock/socket-handles-2
+    \title Winsock 2 Socket Handle
 */
 
 /*!

src/network/socket/qlocalserver.cpp

@@ -210,8 +210,7 @@ QBindable<QLocalServer::SocketOptions> QLocalServer::bindableSocketOptions()
     The type of the descriptor depends on the platform:
     \list
         \li On Windows, the returned value is a
-        \l{https://msdn.microsoft.com/en-us/library/windows/desktop/ms740522(v=vs.85).aspx}
-        {Winsock 2 Socket Handle}.
+        \l{Winsock 2 Socket Handle}.
 
         \li On INTEGRITY, the returned value is the
         QTcpServer socket descriptor and the type is defined by

src/network/socket/qlocalsocket.cpp

@@ -147,8 +147,7 @@ QT_BEGIN_NAMESPACE
 
     \list
         \li On Windows, the returned value is a
-        \l{https://docs.microsoft.com/en-us/windows/win32/winsock/socket-handles-2}
-        {Winsock 2 Socket Handle}.
+        \l{Winsock 2 Socket Handle}.
 
         \li On INTEGRITY, the returned value is the
         QTcpSocket socket descriptor and the type is defined by

src/plugins/platforms/windows/qwindowsmenu.cpp

@@ -56,7 +56,7 @@ QT_BEGIN_NAMESPACE
     \brief Windows native menu bar
 
     \list
-    \li \l{https://msdn.microsoft.com/de-de/library/windows/desktop/ms647553(v=vs.85).aspx#_win32_Menu_Creation_Functions},
+    \li \l{https://docs.microsoft.com/en-us/windows/win32/menurc/about-menus},
          \e{About Menus}
     \endlist