In case I need it in the future

[Eduard Pertíñez i Juncosa]

Debian compiles master as cyrmaster, as long as other files I don't know, such 
as cyradmin possibly.

So when you want to upgrade your debian box with a new cyrus imap version you 
must force the prefix or change your /etc/init.d/cyrus21 script, because if 
not, the old cyrmaster is called and nothing works.

I've been looking for the cyrmaster package (I suposed it was a different 
project) for weeks.

Hope someone writes down the change somewere easy to find.

Thanks,

Eduard
http://www.bredax.com