New 2024 POSIX Standards specify features for sh and standard shell utilities

The document itself is paywalled like all the POSIX specifications, so here are some highlights courtesy of some comments at HackerNews, especially from a-french-anon.

• readlink and realpath
• find -print0, xargs -0 and read -d
• find -iname
• sed -E
• set -o pipefail
• $' ' strings