False positive detection on public-domain_198.RULE and public-domain_317.RULE

A recent scan of several .java files in reactive-streams-1.0.2-sources.jar resulted in false positive detection of public-domain using rules public-domain_198.RULE and public-domain_317.RULE when the files are clearly licensed under cc0-1.0 (also detected, correctly) as evidenced by this notice text in the code:

```
/************************************************************************
* Licensed under Public Domain (CC0) *
* *
* To the extent possible under law, the person who associated CC0 with *
* this code has waived all copyright and related or neighboring *
* rights to this code. *
* *
* You should have received a copy of the CC0 legalcode along with this *
* work. If not, see .*
************************************************************************/
```

The detection should be of cc0-1.0 only and the detection of a generic public-domain is incorrect and misleading.

It should be noted, by the way, that later versions of this code, as of 1.0.4, changed the license altogether:
```
/***************************************************
* Licensed under MIT No Attribution (SPDX: MIT-0) *
***************************************************/
```

However, the license detection problem persists in older versions such as 1.0.2 and 1.0.3.