[clang] [clang-tools-extra] [clang][analyzer] Add ReportInC99AndEarlier option to DeprecatedOrUnsafeBuf… (PR #168704)

[Balázs Benics via cfe-commits]

https://github.com/steakhal commented:

I like where this is going. Thank you for the detection logic. It looks solid and matches my understanding of Annex K.

https://github.com/llvm/llvm-project/pull/168704