bin/tests/system/ifconfig.sh on bind-9.11.4

Summary

(Summarize the bug encountered concisely.)

Steps to reproduce

(How one can reproduce the issue - this is very important.)

What is the current bug behavior?

(What actually happens.)

lo0 and lo0:0 is same interface on Solaris. New ifconfig.sh on bind-9.11.4 overwrites existing lo0 IP address.

What is the expected correct behavior?

(What you should see instead.)

Relevant configuration files

(Paste any relevant configuration files - please use code blocks (```) to format console output. If submitting the contents of your configuration file in a non-confidential Issue, it is advisable to obscure key secrets: this can be done automatically by using named-checkconf -px.)

Relevant logs and/or screenshots

(Paste any relevant logs - please use code blocks (```) to format console output, logs, and code, as it's very hard to read otherwise.)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem.)