[PATCH v9] malloc: add free_sized and free_aligned_sized from C23

[Collin Funk]

Paul Eggert <eggert@cs.ucla.edu> writes:

>> +/* Free a block allocated by `malloc`, `realloc` or `calloc` but not
>
> Let's not use markup-style grave accents in include files; traditional
> ordinary apostrophes are fine.

I was going to mention that, but it seems like this isn't the first
occurrence:

     $ git ls-files | grep '\.[ch]' | xargs grep -E '`[[:alnum:]]+`' \
         | wc -l
     13

Collin