"beck@ modified sys: Fix a collection of covering unveil bugs that prevent unveil's of upper level directories from working when you don't traverse into them starting from /. Most found by brynet@ and a few others. ok brynet@ deraadt@"

https://marc.info/?l=openbsd-cvs&m=154655236614423&w=2

With this change, unveil(2) can become an even more powerful tool that can be used to protect your applications, especially in cases where pledge(2) cannot be used.

#OpenBSD