[Cyrus 2.4] Backup on upgrade

[Anthony Prades]

Hi,

I'm doing some work around backuping datas before Cyrus upgrade. I base my work 
on slapd packaging way.

'configdirectory' and spools indexes were backuped into '/var/backup/cyrus-*' 
directory.
I do some test using my little production datas, migrating from Lenny and 
Squeeze Cyrus 2.2. All works fine.

For now, I don't push changes into official Git repository. My work is available 
here https://github.com/toony/pkg-cyrus-imapd-2.4-toony/tree/debian-sid-upgrade.
I put binaries packages for amd64 into my Sid debian repo 
(https://www.chezouam.net/dokuwiki/doku.php?id=public:debian:chezouammirror#sid).

Happy new year
Anthony