ws2_32: On Win98, SO_MAX_MSG_SIZE is 65527, not 65507.

dlls/ws2_32/tests/sock.c

@@ -1663,7 +1663,8 @@ static void test_extendedSocketOptions(void)
     ret = getsockopt(sock, SOL_SOCKET, SO_MAX_MSG_SIZE, (char *)&optval, &optlen);
 
     ok(ret == 0, "getsockopt failed to query SO_MAX_MSG_SIZE, return value is 0x%08x\n", ret);
-    ok(optval == 65507, "SO_MAX_MSG_SIZE reported %d, expected 65507\n", optval);
+    ok((optval == 65507) || (optval == 65527),
+            "SO_MAX_MSG_SIZE reported %d, expected 65507 or 65507\n", optval);
 
     optlen = sizeof(LINGER);
     ret = getsockopt(sock, SOL_SOCKET, SO_LINGER, (char *)&linger_val, &optlen);