nic with >9 char length dont work with autoipd

.action script tacks ':avahi' on the end of the nic and then /sbin/ip fails.

removing the suffix works, but not sure if this will cause other problems, I dont grok the purpose of the suffix.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: avahi-autoipd 0.7-4ubuntu7
ProcVersionSignature: Ubuntu 5.8.0-38.43~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-38-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Feb 8 23:31:01 2021
InstallationDate: Installed on 2020-05-11 (273 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: avahi
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.avahi.avahi-autoipd.action: 2021-02-08T20:30:24.623209