> That's not hard.  Shutdown MySQL and move the whole directory
> /var/run/mysqld to /var/spool/var/run (which you have to create first).
>  Same with /var/run/saslauthd.   Then replace these directories with
> links; ie:
> 
> ln -s ../spool/postfix/var/run/{saslauthd,mysqld} /var/run
IMHO, this is not a really clean solution though !