Display names automatically modified

When publishing an accessory, the original display name is extended by a four-letter hash, which happens in the publish method in Accessory.ts:

// adding some identifying material to our displayName
    this.displayName = this.displayName + " " + crypto.createHash('sha512')
      .update(info.username, 'utf8')
      .digest('hex').slice(0, 4).toUpperCase();
    this.getService(Service.AccessoryInformation)!.updateCharacteristic(Characteristic.Name, this.displayName);

This seems to be the intended behaviour. However, I cannot find any information about why the hash is added. I checked the HAP Specification (non-commercial version) but I might have missed the corresponding information.

My questions to you:

1. Why is the hash automatically added to the display name?
2. Is there a formal requirement to automatically add the hash?
3. Is there a way to stop this behaviour? That is, to publish exactly the display name I have chosen? Any ideas are welcome.

Thank you very much for your appreciated replies!

[franz-benjamin]

That was really quick! Again, both the fact that you reply as well as the fact that you consider this proposal is highly appreciated. By the way: HAP-NodeJS is great! Thanks for your efforts.

[franz-benjamin]

Don’t worry, I didn’t want to push you. I just felt showing some activity here to show that I am still interested in a reply and am appreciating it would be nice to see. Take your time, I know what it means to be busy.