[libc-commits] [libc] [libc][docs] Add netinet/in header documentation by referring to POSIX standards (PR #122411)

[Nick Desaulniers via libc-commits]

https://github.com/nickdesaulniers requested changes to this pull request.

While I appreciate detailed commit messages / PR descriptions, it's perhaps redundant to re-list the added macros there.

https://github.com/llvm/llvm-project/pull/122411