Remove dependency on wsock32.lib in favor of ws2_32

ws2_32 is the new version of the library that should be used, as
it contains the require functionality from wsock32 as well as some
more (which is why some binaries were already using ws2_32).

Michael Paquier, reviewed by MauMau

configure

@@ -7659,7 +7659,7 @@ return socket ();
   return 0;
 }
 _ACEOF
-for ac_lib in '' socket wsock32; do
+for ac_lib in '' socket ws2_32; do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else