Add a "findremoved" arg to shm_find_segment_by_shmid() similar to NetBSD and allow shmctl() to operate on shm segments that have been marked for removal like other OSes do.
Add a "findremoved" arg to shm_find_segment_by_shmid() similar to
NetBSD and allow shmctl() to operate on shm segments that have been
marked for removal like other OSes do.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars