On the FreeNAS installation ISO image, /rescue
is the directory which contains all the executables which run
from the shell.  /usr/bin , /usr/sbin, /sbin , /bin are all symlinks
to /rescue.  To add a new executable to the ISO image, you
need to add it to /rescue.

Add /rescue/less to the ISO, and add /rescue/more as a link to /rescue/less.

    |------------------------------------------------------------------------
    |r250626 | delphij | 2013-05-13 15:16:33 -0700 (Mon, 13 May 2013) | 5 lines
    |Changed paths:
    |   M /head/rescue/rescue/Makefile
    |
    |Add less to rescue build.  On amd64, this increases rescue size by about
    |130KB or 2.4%.
    |
    |MFC after:      1 month
    ------------------------------------------------------------------------
Merge branch 'freenas-9-stable' of https://github.com/rodrigc/trueos into freenas-9-stable