ASN Lookup expert: Missing sane default value for database path

[sebix]

intelmq/intelmq/bots/experts/asn_lookup/expert.py

Line 28 in adb2d15

database = None # TODO: should be pathlib.Path

I suggest that the default path is /var/lib/intelmq/bots/asn_lookup/ipasn.dat as was the case some time ago.

Also, the update script could check first if the path exists (and isn't a None or empty string) and even if it is writeable before downloading the data.