RpcChannelOptions的connect_timeout是否支持呢

[liuyajun52]

sofa-pbrpc/src/sofa/pbrpc/rpc_channel.h

Lines 20 to 28 in c2cf352

	struct RpcChannelOptions {
	// Connect timeout (in seconds).
	// If a request can't get an healthy connection after a connect_timeout
	// milliseconds, it will fail and return to the caller.
	//
	// Not supported now.
	int64 connect_timeout;

你好，我在看代码的时候发现connect_timeout被注释为Not supported now，但是在

sofa-pbrpc/src/sofa/pbrpc/rpc_client_impl.cc

Line 382 in c2cf352

stream->set_connect_timeout(_options.connect_timeout);

sofa-pbrpc/src/sofa/pbrpc/rpc_byte_stream.h

Lines 110 to 115 in c2cf352

	if (_connect_timeout > 0)
	{
	_timer.expires_from_now(boost::posix_time::milliseconds(_connect_timeout));
	_timer.async_wait(boost::bind(&RpcByteStream::on_connect_timeout, shared_from_this(), _1));
	}
	}

中，似乎有检查了超时，所以，到底是否支持超时设置呢，单位又是毫秒还是秒呢