ramdisk in /var/ and database in /var/db/

If pfsense is set up to use a RAM disk for /var, the LAPI cannot be used because its database and geoip tables would be lost at every reboot. opnsense had the same option but they switched it to /var/log in recent releases.

We can:

warn the user in the install docs, to disable ram disk and reboot (done)
provide a checkbox to install the database in /conf/ or /root/, this can set data_dir before running crowdsec for the first time. This is pragmatic but doesn't fit with the rest of the options, because it cannot be changed later.
detect if RAM disk is enabled in the configuration and warn the user in the UI -- does not solve the issue but it's a safeguard
always install the db in /root/ or /conf/ instead of /var/db/. meh.

if option 1 is enough, we can close this. Maybe 1+3 ?

crowdsecurity / pfSense-pkg-crowdsec

ramdisk in /var/ and database in /var/db/ #21