after opening the console, replacing init as PID 1. From the user point of view, it makes it possible to run eg the shell as PID 1, using 'set init_exec=/bin/sh' at the loader(8) prompt. Reviewed by: kib MFC after: 2 weeks Relnotes: yes Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D16625