http://cypherpunk-handbook.i2p/articles/openbsd.html
Its design divides SMTP reception, queueing, lookup,
scheduling, control, and delivery among processes with distinct
privileges, as documented in section 19 below. 11 - KARL OpenBSD installs a kernel link kit during installation and upgrades.
After each boot, reorder_kernel(8) relinks the kernel's
object files in randomized order for the next boot.