Fix IPv4 and IPv6 output in Armbian welcome MOTD

[useful64]

Description

Now "Armbian welcome MOTD" only prints one LAN IPv4 address and does not print any IPv6 address if you have more than one.

I changed to print all IPv4 and IPv6 addresses. I also made some cosmetic changes (based on .editorconfig from this repository).

How Has This Been Tested?

• On dev machine.

Checklist:

Please delete options that are not relevant.

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings

[igorpecovnik]

Thank you for addressing this problem. Current way is not the best and we also have a Jira ticket on the topic. https://armbian.atlassian.net/browse/AR-2571

I tried changed script and few of our production servers:

What stand out is:

• ipv6 management. WAN ipv6 is among all and in the (Outgoing WAN) section. Also there is probably very small need to display local IPV6 addresses?

The other example machine:

IPv4 addresses: (LAN) 100.100.100.100, XX.YYY.XX (WAN) 100.100.100.100
IPv6 addresses: (All) 2 x local, 2 x external (one from tailscale, other from ISP)

Here we also have unnecessary duplication. We need to shuffle the logic around a bit - space for displaying is very limited, so its important we try our best.

The other issue is cosmetic nature - aligning data into columns. Now, IP sticks out as label text is longer.

Thank you!