you'll see the following message:
# /etc/rc.d/ipfs stop
/etc/rc.d/ipfs: WARNING: $ipfs is not set properly.
This horrible change is needed because of the "shutdown" keyword.
keep state to be locked (modification prevented) and then saved to disk,
allowing for the system to experience a reboot, followed by the restoration
of that information, resulting in connections not being interrupted.
To activate this feature, set ipfs=YES in /etc/rc.conf