doc: fix link to MSG_ZEROCOPY patchset

Use https and link to the patch directly.

Signed-off-by: Tobias Klauser <[e-mail]>
Acked-by: Willem de Bruijn <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/networking/msg_zerocopy.rst

···
 
   patchset
     [PATCH net-next v4 0/9] socket sendmsg MSG_ZEROCOPY
-    http://lkml.kernel.org/r/[e-mail]
+    https://lkml.kernel.org/netdev/[e-mail]
 
 
 Interface