[Users] no fifo_db_url given - fifo DB commands disabled

[D'Addelfio Davide]

Hello, this is what I have in my syslog file when I running openser, I'd
like to know what's mean the last line, what's fifo_db_url and why it is
disabled?

Apr 10 01:02:30 localhost /usr/sbin/openser[1409]: INFO: fifo process
starting: 1409
Apr 10 01:02:30 localhost /usr/sbin/openser[1409]: open_uac_fifo: fifo
server up  at /tmp/openser_fifo...
Apr 10 01:02:30 localhost /usr/sbin/openser[1409]: INFO: no fifo_db_url
given - fifo DB commands disabled!

Thanks for reply.
Davide