Change log for ELASTIC_PACKETBEATS

Date	Changes
2025-02-13	Enhancement: - Added support to parse string value of dhcpv4.client_mac to network.dhcp.client_identifier_string.
2025-01-28	Enhancement: - Mapped dns.response_code to additional.fields.
2025-01-02	Enhancement: - When rCode is 0 then mapped rCode to dns.response_code.
2024-08-20	Enhancement: - Mapped dhcpv4.assigned_ip to network.dhcp.yiaddr. - Mapped dhcpv4.flags, dhcpv4.hardware_type, dhcpv4.option.rebinding_time_sec, dhcpv4.option.rebinding_time_sec, dhcpv4.option.renewal_time_sec, and dhcpv4.option.max_dhcp_message_size to security_result.detection_fields. - Mapped dhcpv4.option.parameter_request_list, and dhcpv4.option.dns_servers to additional.fields. - Mapped dhcpv4.hops to network.dhcp.hops. - Mapped dhcpv4.relay_ip to network.dhcp.giaddr. - Mapped dhcpv4.option.domain_name to network.dhcp.client_hostname. - Mapped dhcpv4.option.router to network.dhcp.ciaddr. - Mapped dhcpv4.seconds to network.dhcp.seconds.
2024-03-23	Enhancement: - Mapped headers.accept_encoding and headers.x_envoy_attempt_count to security_result.about.labels. - Mapped headers.content_length, headers.content_type, headers.x_forwarded_proto, headers.x_b3_sampled, headers.http_accept, headers.x_b3_parentspanid, headers.x_envoy_original_path, client_cert and headers.x_request_id to additional.labels. - Mapped headers.http_user_agent to network.http.user_agent. - Mapped headers.request_method to network.http.method. - Mapped dns.resolved_ip to network.dns.additional. - Mapped headers.http_host to principal.hostname. - Mapped headers.x_forwarded_for and host to principal.ip
2022-05-09	Added mapping for server_name, application, user_id, user_name, level, msg, logger, audit_category, audit_cluster_name, audit_node_id, audit_node_name, audit_request_effective_user, component, uuid.
2022-04-12	Added generic string for Vendor name and replaced different product names to a generic value string.