Error upgrading avahi-daemon while updating from 11.04 to 11.10

[Brent Spillner]

While updating a vanilla 11.04 install to 11.10, I received the following errors in the dist-upgrade log:

Preparing to replace avahi-daemon 0.6.30-0ubuntu2 (using .../avahi-daemon_0.6.30-4ubuntu1_i386.deb) ...^M
invoke-rc.d: unknown initscript, /etc/init.d/avahi-daemon not found.^M
dpkg: warning: subprocess old pre-removal script returned error exit status 100^M
dpkg - trying script from the new package instead ...^M
invoke-rc.d: unknown initscript, /etc/init.d/avahi-daemon not found.^M
dpkg: error processing /var/cache/apt/archives/avahi-daemon_0.6.30-4ubuntu1_i386.deb (--unpack):^M
 subprocess new pre-removal script returned error exit status 100^M
invoke-rc.d: unknown initscript, /etc/init.d/avahi-daemon not found.^M
dpkg: error while cleaning up:^M
 subprocess installed post-installation script returned error exit status 100^M

Reporting this bug as requested by the Distribution Upgrade application.

[Brent Spillner (spillner)]

Looks like it's just missing a symlink in /etc/init.d... no idea if it was there before I started the upgrade, but it's certainly not now (upgrade complete, just waiting to reboot.)

Given the general irrelevance of avahi for most setups I'd say this is a pretty minor issue, but it might perhaps confuse some users... at any rate, I'd expect the (un)installation script to be more resilient.