When bsdinstall(8) sources the bsdconfig(8) common.subr file,
PKG_ABI is set by calling 'pkg -vv' and searching for the ABI
pkg(8) will use.
When pkg(8) is run for the first time, the bootstrap process
is run, which prompts for 'y/N' input from stdin if running with
TERM set.
Since TERM is set and it is the first time pkg(8) is run, which
happens automatically, bsdinstall(8) hangs waiting for user input
which is never displayed since a specific line is expected by
awk(1), and stdin is expected by pkg(8).
Set ASSUME_ALWAYS_YES=1, which will cause pkg(8) to assume the
'-y' flag is also used for the bootstrap process, allowing
bsdinstall(8) to proceed to the keymap lookup, otherwise
bsdinstall(8) appears to hang after selecting 'Install' from the
menu on first boot from CDROM.