[ruby-core:114617] [Ruby master Misc#19860] Update license phrases to SPDX BSD-2-Clause

Issue #19860 has been reported by nobu (Nobuyoshi Nakada). ---------------------------------------- Misc #19860: Update license phrases to SPDX BSD-2-Clause https://bugs.ruby-lang.org/issues/19860 * Author: nobu (Nobuyoshi Nakada) * Status: Assigned * Priority: Normal * Assignee: matz (Yukihiro Matsumoto) ---------------------------------------- There seem to be many variations on the "2-clause BSDL" these days. The current BSDL file seems to be the old style of the BSD 2 Clause "Simplified" license (BSD-2-Clause), so I think we should clarify this and update it to a more [recent version]. [recent version]: https://spdx.org/licenses/BSD-2-Clause.html -- https://bugs.ruby-lang.org/