Add idn2-utils to image as it is needed for pihole -q

[yubiuser]

As the title says. Fixes a bug reported here:
#1577

[DL6ER]

Is idn2 still used by pihole -q even when it queries FTL's API? We could easily expose FTL's own idn capabilities over the API if needed.

[yubiuser]

It was there when I wrote the v5 -> v6 update and I kept it.

https://github.com/pi-hole/pi-hole/blob/0a193f98a43c1c914b836b0a1c2b02cf60b58ac8/advanced/Scripts/query.sh#L112-L113

[yubiuser]

Last commit should fix changes required after pi-hole/FTL#1707

[PromoFaux]

@yubiuser rebase on development-v6, I've admin-crimed your latest commit there.

[PromoFaux]

Could (thinking out loud here) FTL handle the part of converting the ${domain} value it is passed to punycode and lowercase itself?

[DL6ER]

@PromoFaux Like pi-hole/FTL#1715 ?

[PromoFaux]

Like this. So with that PR, we would still need to convert to lower case in the bash, right?

[PromoFaux]

No scratch that, Not had my coffee - I misread your typings

[yubiuser]

Closing as pi-hole/FTL#1715 works as expected.

idn2 is not required anymore: pi-hole/pi-hole#5468