PROBLEM (see #487)
- ET rule files start with the "emerging-*" prefix;
- ETPRO rule files do not start with that prefix.
SOLUTION
Concatenate all rule files, with the exception of "*disabled.rules",
into a single rule file at "/etc/suricata/rules/tpotce.rules"
I have left as-is the "sed" command that enables all commented-out
rules. Since that is usually done for performance reasons, maybe it
could be turned into a configuration option like the OINKCODE.
Another thing worth considering is to use "suricata-update" instead:
https://suricata-update.readthedocs.io/en/latest/quickstart.html
fix condition when no internet connection is available
check internet connection before download of rules and avoid errors
check internet connection before setting up capture filters (with FQDNs, resulted in endless restart of suricata) and unset capture filters if no internet connection is available
