there is not -a option.
Sorry for bothering, i have found the solution here: http://www.dmo.ca/blog/20081009143754
So all we need to do is:
nano /etc/rsyslog.d/bind-chroot.conf and add line
check the you have added following in bind conf as described in etch perfect setup
OPTIONS="-u bind -t /var/lib/named"
make sure it creates /dev/log in the chroot:
ls -al /var/lib/named/dev/log
srw-rw-rw- 1 root root 0 2009-01-24 13:45 /var/lib/named/dev/log
and make sure in works
ps ax | grep [n]amed
28512 ? Ssl 0:00 /usr/sbin/named -u bind -t /var/lib/named