While generating SBOMs for the agent, using CycloneDX's cyclonedx-gomod utility, and asking for license detection, the utility warns that the go module zabbix.com has no license information.

The utility uses go-enry's go-license-detector library the perform the detection. The library uses this algorithm to perform the detection.

From what I can tell, this is in line with how licensing information is declared and provided in the majority of projects employing Go.

The Go project have a general policy for how a license should be specified for a module, which should be followed to allow tools for reliable license detection.

Additionally, it seems that the agent module doesn't have a name, except a vendor string zabbix.com, which makes it ambiguous.

We should add the appropriate license to the module root.