Change log for PFSENSE

Date	Changes
2023-05-05	Enhancement: - Added convert to uppercase before mapping "network.ip_protocol". - Mapped "column18" to "principal.port" when protocol is present in "column13". - Mapped "column19" to "target.port" when protocol is present in "column13". - Mapped "column20" to "additional.fields" as "data-length" when protocol is present in "column13".
2023-02-20	Enhancement: - Added Grok pattern to support new filter-log format and syslog-ng format.
2022-10-04	Enhancement: - Remapped firewall device name to intermediary.hostname instead of principal.hostname for logs where event_types is "NETWORK_CONNECTION".
2022-09-05	Enhancement- - for csv format logs mapped following fields. - Added grok pattern to retrieve "IP" and "MAC". - Mapped "column19" which is "source-address" to "network.dhcp.yiaddr". - Mapped "security_result.action" to "ALLOW" when "column7" is equal to "pass". - When "column9" is equals to "6" which indicates "IPV6", then following fields are mapped: - Mapped "column17" which is "destination-address" to "target.ip". - Mapped "column16" which is "source-address" to "principal.ip". - Mapped "event_type" to "NETWORK_CONNECTION" when "column16" and "column17" is not null. - Mapped "column12" which is "hop_limit" to "additional.fields". - Mapped "column13" which is "ip_protocol" to "network.ip_protocol". - Migrated the custom parsers into default parser. - Added conditional check to set "event_type" to "STATUS_UPDATE"
2022-06-30	Enhancement: - Mapped "ttl" to "additional.fields". - Mapped "Id" to "additional.fields". - Mapped "Offset" to "additional.fields". - Mapped "Data length" to "additional.fields". - Mapped "Length" to "additional.fields". - Mapped "Sequence-number" to "additional.fields".
2022-04-11	Newly created parser