fix: missing fields of NetConf::is_empty

[Zerorigin]

补全realm::conf::net::NetConf 内置函数is_empty遗漏的属性。

realm/src/conf/net.rs

Lines 67 to 73 in d8810e3

	fn is_empty(&self) -> bool {
	crate::empty![self =>
	ipv6_only,
	send_proxy, accept_proxy, send_proxy_version, accept_proxy_timeout,
	tcp_keepalive, tcp_keepalive_probe, tcp_timeout, udp_timeout
	]
	}

[zephyrchien]

LGTM. Thanks!