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>
fc73b585f8