The man page for avahi-daemon(8) DESCRIPTION secction makes reference to the following pathname:
That appears to be incorrect. The correct pathname is, I believe:
You have to tell us which avahi port you have installed.
The answer is:
This has been fixed in r529889, it just wasn't merged from head to the quarterly branch 2020Q4.
Oh, wait, I committed the fix on 2020-03-30 so this bug is also in the latest quarterly branch.
Thanks for the report anyway :) it's great to see people care about things. Cheers!