chroot. Allows ChrootDirectory to work with selinux support compiled in
but not enabled. Using it with selinux enabled will require some selinux
support inside the chroot. "looks sane" djm@
[contrib/redhat/sshd.init openbsd-compat/Makefile.in]
[openbsd-compat/openbsd-compat.h openbsd-compat/port-linux.c]
[openbsd-compat/port-linux.h] Add support for SELinux, setting
the execution and TTY contexts. based on patch from Daniel Walsh,
bz #880; ok dtucker@