message: Fix the unix socket for MySQL coro.
diff: @@ -513,10 +513,10 @@ static PHP_METHOD(swoole_mysql_coro, connect)
  swClient *cli = emalloc(sizeof(swClient));
  int type = SW_SOCK_TCP;
  - if (strncasecmp(connector->host, ZEND_STRL("unix://")) == 0)
  + if (strncasecmp(connector->host, ZEND_STRL("unix:/")) == 0)
  {
  - connector->host = connector->host + 6;
  - connector->host_len = connector->host_len - 6;
  + connector->host = connector->host + 5;
  + connector->host_len = connector->host_len - 5;
  type = SW_SOCK_UNIX_STREAM;
  }
  else if (strchr(connector->host, ':'))
  @@ -540,11 +540,15 @@ static PHP_METHOD(swoole_mysql_coro, connect)
  RETURN_FALSE;
  }
  + //tcp nodelay
  + if (type != SW_SOCK_UNIX_STREAM)
  + {
  int tcp_nodelay = 1;
  if (setsockopt(cli->socket->fd, IPPROTO_TCP, TCP_NODELAY, (const void *) &tcp_nodelay, sizeof(int)) == -1)
  {
  swoole_php_sys_error(E_WARNING, "setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) failed.", cli->socket->fd);
  }
  + }
  int ret = cli->connect(cli, connector->host, connector->port, connector->timeout, 1);
  if ((ret < 0 && errno == EINPROGRESS) || ret == 0)
  