stubby: Use standard notation for IPv6 local loopback address ( ::1 instead of 0::1 )

[shoulders]

Maintainer: @jamesmacwhite
Environment:

Item	Value
Model	BT Home Hub 5A
Architecture	xRX200 rev 1.2
Firmware Version	OpenWrt 21.02.1 r16325-88151b8303 / LuCI openwrt-21.02 branch git-21.295.67054-13df80d
Kernel Version	5.4.154

Description:

Within the documentation and config files of stubby and the OpenWrt instructions you use the address 0::1 for the IPv6 local loopback address (which does work) but I cannot find anywhere else that uses this form, everyone uses ::1

I think these instances should be changed to keep things easier to read unless there is a technical reason for this.

These are a few that I found

README.md (several occurances)
https://github.com/openwrt/packages/blob/master/net/stubby/files/README.md

packages/net/stubby/files/stubby.conf

Line 19 in 04b82e9

list listen_address '0::1@5453'

packages/net/stubby/files/stubby.yml

Line 14 in 04b82e9

- 0::1@5453

I have posted this over at getdnsapi/stubby aswell ****

[jamesmacwhite]

Hi. Not the maintainer I'm afraid, but submit a PR and someone with push access can help get it merged.

[msvamp]

This seems like a limitation in the upstream stubby:

• stubby.yml.example (line 17)
• stubby.yml.example (lines 126-127)

However, no reason for this limitation is specified.

In my recent PR (#18863), I have added a note in the README about this: https://github.com/openwrt/packages/pull/18863/files#diff-19dbc41aac11b9f660a125da07966a249ce1a0407f1072ea23ac7c28efc35113R232-R234