Change log for F5_VPN

Date Changes
2024-10-23 Enhancement:
- Added support for KV format.
2024-05-20 Enhancement:
- Modified a Grok pattern to parse principal.resource.name correctly.
- Added a Grok pattern to parse uid and sAmAccountName and mapped to target.hostname.
- Mapped Hostname to target.hostname and target.asset.hostname.
- Mapped sess_id to network.session_id for SAML Agent messages.
2024-03-05 Enhancement:
- Added a Grok pattern to parse syslog logs.
- Mapped internal_ip to target.ip and target.asset.ip.
- Mapped sess_id to network.session_id.
- Mapped file_path to principal.resource.name.
- Mapped useragent to network.http.user_agent.
- Mapped User-Agent and useragent to network.http.parsed_user_agent.
- Mapped username to target.user.userid.
- Mapped sid to target.user.windows_sid.
- Mapped bytes_out to network.sent_bytes.
- Mapped bytes_in to network.received_bytes.
- Mapped Platform to principal.platform.
- Mapped Platform_Version to principal.platform_version.
- Mapped Javascript_Support, ActiveX_Support, Plugin_Support, Version, Model, CPU, UI_Mode, SP, IDP, to_rule_item, from_rule_item, policy_result, rule, resource, ppp_id, tunnel_resource, server_vip_ip, server_vip_name, and Canonical_Info to additional.fields.
2022-07-22 Enhancement:
- Modified grok pattern to parse the date present in RFC 3339 format.
- Added gsub to remove / from resource_id.
2022-07-08 Enhancement:
- Mapped uri_path to target.url.
- Mapped protocol to network.application_protocol.
- Mapped method to network.http.method.
- Mapped User-Agent to network.http.user_agent.
- Mapped s_ip to src.ip.
- Mapped t_ip to target.ip.
- Mapped t_port to target.port.
- Mapped s_nat_ip to target.nat_ip.
- Mapped ip_protocol to network.ip_protocol.
- Mapped descrip to security_result.description.
- Mapped user to principal.user.userid.
- Mapped command to target.process.command_line.
When application is equal to logger
- Mapped cipher_name to network.tls.cipher.
- Mapped tls_version to network.tls.version.
- Mapped resource_id to target.resource.id
- Mapped src_ip to principal.ip.
- Mapped url to network.http.referral_url.
- Mapped status to network.http.response_code.