使用cmsg公共库解析cmsg信息，对业务层提供获取cmsg句柄的接口

platform/src/ssl_stream.cpp

@@ -820,7 +820,6 @@ static void ssl_async_peek_client_hello(struct future * f, evutil_socket_t fd, s
 	struct peek_client_hello_ctx * ctx = ALLOC(struct peek_client_hello_ctx, 1);
 	ctx->ev = event_new(evbase, fd, EV_READ, peek_client_hello_cb, p);
 	ctx->evbase = evbase;
-	ctx->parse_client_cipher=parse_cipher;
 	ctx->logger = logger;
 	promise_set_ctx(p, (void *) ctx, peek_client_hello_ctx_free_cb);
 	event_add(ctx->ev, NULL);