Fix broken link to MSDN (GH-102355)

(cherry picked from commit 9a8b66b)

Co-authored-by: 谭九鼎 <109224573@qq.com>

Lib/socket.py

@@ -902,7 +902,7 @@ def create_server(address, *, family=AF_INET, backlog=None, reuse_port=False,
         # address, effectively preventing this one from accepting
         # connections. Also, it may set the process in a state where
         # it'll no longer respond to any signals or graceful kills.
-        # See: msdn2.microsoft.com/en-us/library/ms740621(VS.85).aspx
+        # See: https://learn.microsoft.com/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse
         if os.name not in ('nt', 'cygwin') and \
                 hasattr(_socket, 'SO_REUSEADDR'):
             try:

Lib/test/support/socket_helper.py

@@ -58,7 +58,7 @@ def find_unused_port(family=socket.AF_INET, socktype=socket.SOCK_STREAM):
     http://bugs.python.org/issue2550 for more info.  The following site also
     has a very thorough description about the implications of both REUSEADDR
     and EXCLUSIVEADDRUSE on Windows:
-    http://msdn2.microsoft.com/en-us/library/ms740621(VS.85).aspx)
+    https://learn.microsoft.com/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse
 
     XXX: although this approach is a vast improvement on previous attempts to
     elicit unused ports, it rests heavily on the assumption that the ephemeral