Says right there in the issue title.
Current gameplan is this, run every so often:
# save ZNC's config
killall -USR1 znc
# bncbot saves on every change to its database
# tgz and transfer over ssh, make sure you have ssh keys setup
tar zcvf - ~znc/.znc ~bot/bncbot/bncusers.json | \
ssh remote@backup_location \
'cat - > stormbnc-backup-`time`.tgz