Revert "Don't use SO_REUSEADDR on Windows."

This reverts commit c1a04b6dfd.

oio-win.c

@@ -363,6 +363,14 @@ static oio_req* oio_overlapped_to_req(OVERLAPPED* overlapped) {
 static int oio_set_socket_options(SOCKET socket) {
   DWORD yes = 1;
 
+  /* Set the SO_REUSEADDR option on the socket */
+  /* If it fails, soit. */
+  setsockopt(socket,
+             SOL_SOCKET,
+             SO_REUSEADDR,
+             (char*)&yes,
+             sizeof(int));
+
   /* Make the socket non-inheritable */
   if (!SetHandleInformation((HANDLE)socket, HANDLE_FLAG_INHERIT, 0)) {
     oio_set_sys_error(GetLastError());