BSD/GPL false positive

### Description

Scanning the following license text:

```
Source code in this repository is licensed under various licenses. The
Business Source License 1.1 (BSL) is one such license. Each file indicates in
a section at the beginning of the file the name of the license that applies to
it. All licenses used in this repository can be found in the top-level
licenses directory.
```

gives me:

```
{
"identifier": "bsd_new_or_gpl_2_0__and_bsl_1_1-1599420a-93b5-3185-5f84-e963a785af88",
"license_expression": "(bsd-new OR gpl-2.0) AND bsl-1.1",
"license_expression_spdx": "(BSD-3-Clause OR GPL-2.0-only) AND BUSL-1.1",
"detection_count": 1,
"detection_log": [],
"reference_matches": [
{
"license_expression": "bsd-new OR gpl-2.0",
"license_expression_spdx": "BSD-3-Clause OR GPL-2.0-only",
"from_file": "8/488b5883433152f8",
"start_line": 1,
"end_line": 2,
"matcher": "3-seq",
"score": 12.38,
"matched_length": 5,
"match_coverage": 12.5,
"rule_relevance": 99,
"rule_identifier": "bsd-new_or_gpl-2.0_32.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/bsd-new_or_gpl-2.0_32.RULE"
},
{
"license_expression": "bsl-1.1",
"license_expression_spdx": "BUSL-1.1",
"from_file": "8/488b5883433152f8",
"start_line": 2,
"end_line": 2,
"matcher": "2-aho",
"score": 100.0,
"matched_length": 5,
"match_coverage": 100.0,
"rule_relevance": 100,
"rule_identifier": "bsl-1.1_3.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/bsl-1.1_3.RULE"
}
]
},
```

but there is absolutely no mention of BSD or GPL in the license text at all.