Change log for OPENGEAR

Date Changes
2024-09-13 Enhancement:
- Added support for new format of SYSLOG logs.
2024-06-24 Enhancement:
- Added the Grok patterns to handle the new pattern of authentication logs.
- Mapped principal_port to principal.port.
2024-05-09 Enhancement:
- Added Grok patterns to parse a new pattern of SYSLOGS.
- Mapped url to target.url.
- Mapped msg to metadata.description.
- Mapped x-pid to principal.process.pid.
- Mapped level to security_result.severity.
- Mapped http_method to network.http.method.
- Mapped swVersion to principal.platform_version.
- Mapped origin_software to principal.application.
- Mapped target_ip to target.ip and target.asset.ip.
- Mapped module, graphdrivers, commit, and version to additional.fields.
2024-04-05 - Newly created parser