gen_socket:connect 一直阻塞

按照首页文档创建服务器和客户端，
服务器accept返回，
3> {ok, S} = gen_socket:accept(L).
{ok,{140226430765064,<<>>}}

客户端connect一直阻塞
{ok, S} = gen_socket:connect("127.0.0.1", 10000, []).
tcpdump抓包三次握手也已经建立成功。

Start with the homepage server/client example and reproduce the blocking gen_socket:connect("127.0.0.1", 10000, []) call alongside the successful gen_socket:accept/ tcpdump results. Trace the connect entry point and compare the client and server behavior; done means the documented client connection returns instead of blocking, with the cause and verification recorded.

Written by the indexing model from the issue text.