Change log for ELASTIC_PACKETBEATS

Date	Changes
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.