Update luasocket to lunarmodules/luasocket@98be8d9

Fixes #1663.

src/libraries/luasocket/libluasocket/options.c

@@ -54,6 +54,33 @@ int opt_meth_getoption(lua_State *L, p_opt opt, p_socket ps)
     return opt->func(L, ps);
 }
 
+/*------------------------------------------------------*/
+/* binds socket to network interface */
+int opt_set_bindtodevice(lua_State *L, p_socket ps)
+{
+#ifndef SO_BINDTODEVICE
+    return luaL_error(L, "SO_BINDTODEVICE is not supported on this operating system");
+#else
+    const char *dev = luaL_checkstring(L, 3);
+    return opt_set(L, ps, SOL_SOCKET, SO_BINDTODEVICE, (char*)dev, strlen(dev)+1);
+#endif
+}
+
+int opt_get_bindtodevice(lua_State *L, p_socket ps)
+{
+#ifndef SO_BINDTODEVICE
+    return luaL_error(L, "SO_BINDTODEVICE is not supported on this operating system");
+#else
+    char dev[IFNAMSIZ];
+    int len = sizeof(dev);
+    int err = opt_get(L, ps, SOL_SOCKET, SO_BINDTODEVICE, &dev, &len);
+    if (err)
+        return err;
+    lua_pushstring(L, dev);
+    return 1;
+#endif
+}
+
 /*------------------------------------------------------*/
 /* enables reuse of local address */
 int opt_set_reuseaddr(lua_State *L, p_socket ps)
@@ -190,7 +217,7 @@ int opt_set_send_buf_size(lua_State *L, p_socket ps)
 	return opt_setint(L, ps, SOL_SOCKET, SO_SNDBUF);
 }
 
-// /*------------------------------------------------------*/
+/*------------------------------------------------------*/
 
 #ifdef TCP_FASTOPEN
 int opt_set_tcp_fastopen(lua_State *L, p_socket ps)