Day 12 of making a Unix clone
New syscalls: getdents, fexecve
Fleshed out the filesystem implementation via os:: in the Bunnix port of the Hare stdlib
Some more inode refactoring done
(f)execve(2) now populates auxilary vector of new process
Next: stat/fstat/fstatat, respect/enforce open flags and file modes (e.g. O_WRONLY on a file with -w should not work, implement O_DIRECTORY, etc)