net inactive_format is not used when the interface is down and `$ip` placeholder not found

[kevenwyld]

I'm not sure if this is intentional or not however inactive_format seems not to be used when the interface is down. In my case I have a vpn which I turn on and off as needed. It is defined as the following block:

[[block]]
block = "net"
device = "vpn0"
format = "$icon UP"
inactive_format = "$icon DOWN"

If the state of the adapter is down:

] > ip addr show dev vpn0
10: vpn0: <NO-CARRIER,POINTOPOINT,MULTICAST,NOARP,UP> mtu 1390 qdisc fq_codel state DOWN group default qlen 500
    link/none
    inet6 fe80::8cb5:e9db:d6a3:1d8/64 scope link stable-privacy
       valid_lft forever preferred_lft forever

i3status-rs reports:

  {
    "full_text": " UP",
    "color": "#C1C1C1FF",
    "background": "#06060FFF",
    "name": "10",
    "instance": "10:",
    "separator": false,
    "separator_block_width": 0,
    "markup": "pango"
  },

This also seems to cause some issues with the $ip placeholder which reports Failed to render full text (Cause: Placeholder 'ip' not found)

Everything works fine if I bring the vpn up though.

[MaxVerevkin]

Huh, this must be because we special-case vpn interfaces to always report "up", which was the case since the initial vpn support (#350)...

i3status-rust/src/netlink.rs

Lines 103 to 108 in 2186e7b

	pub fn is_up(&self) -> bool {
	self.tun_wg_ppp
	|| self.iface.operstate == Operstate::Up
	|| (self.iface.operstate == Operstate::Unknown
	&& (self.ip.is_some() || self.ipv6.is_some()))
	}

[MaxVerevkin]

I wonder if this hack can be removed since we have eed699a.