A url link to artistic-perl-1.0 is detected as `free-unknown`

[chinyeungli]

A url link to artistic-perl-1.0 is detected as free-unknown.

    - score: '100.0'
      matcher: 2-aho
      end_line: 221
      rule_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/free-unknown_96.RULE
      from_file:
      start_line: 221
      matched_text: (L<http://opensource.org/licenses/Artistic-Perl-1.0>).
      match_coverage: '100.0'
      matched_length: 4
      rule_relevance: 100
      rule_identifier: free-unknown_96.RULE
      license_expression: free-unknown
      license_expression_spdx: LicenseRef-scancode-free-unknown

The link should have enough clue to detect artistic-perl-1.0 instead.

[AyanSinhaMahapatra]

Fixed in #4405

[AyanSinhaMahapatra]

added in #4405, closing