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