Do better on keyboard selection, plus save it in installed image.
Also, pv(1) output for install doesn't scroll anymore.
Clean up build_iso for readability, and workaround digest(1) problem.
Invoke kbd -s first-thing in kayak-menu
Kayak for ISO checkpoint 1

          --- old/data/known_extras
          +++ new/data/known_extras

   1    1  0 /usr/sbin/reboot
   2    2  0 /usr/sbin/installboot
   3    3  0 /usr/bin/cp
   4    4  0 /usr/bin/mv
   5    5  0 /usr/bin/wc
   6    6  0 /usr/bin/uniq
   7    7  0 /usr/bin/sort
   8    8  0 /usr/bin/bc
   9    9  0 /usr/bin/dc
  10   10  0 /usr/bin/sleep
  11   11  0 /usr/sbin/disks
  12   12  0 /usr/sbin/prtconf
  13   13  0 /usr/sbin/amd64/prtconf
  14   14  0 /usr/sbin/swap
  15   15  0 /usr/sbin/amd64/swap
  16   16  0 /usr/sbin/modinfo
  17   17  0 /usr/sbin/amd64/modinfo
  18   18  0 /usr/sbin/modload
  19   19  0 /usr/sbin/amd64/modload
  20   20  0 /usr/sbin/modunload
  21   21  0 /usr/sbin/amd64/modunload
  22   22  0 /usr/sbin/add_drv
  23   23  0 /usr/sbin/amd64/add_drv
  24   24  0 /usr/sbin/update_drv
  25   25  0 /usr/sbin/amd64/update_drv
  26   26  0 /usr/sbin/rem_drv
  27   27  0 /usr/sbin/amd64/rem_drv
  28   28  0 /lib/fm/amd64/libfmevent.so.1
  29   29  0 /lib/fm/libfmevent.so.1
  30   30  0 /lib/libcontract.so
  31   31  0 /usr/lib/libinstzones.so.1
  32   32  0 /usr/lib/libl.so.1
  33   33  0 /usr/lib/libsasl.so.1
  34   34  0 /usr/lib/amd64/libsasl.so.1
  35   35  0 /usr/bin/svcs

  36   36  0 /usr/sbin/svccfg
  37   37  0 /usr/sbin/zstreamdump
  38   38  0 /usr/lib/utmpd
  39   39  0 /lib/libintl.so.1
  40   40  0 /usr/bin/less
  41   41  0 /usr/bin/more
  42   42  0 /usr/lib/libgss.so.1
  43   43  0 /lib/libcrypto.so.1.0.0
  44   44  0 /usr/bin/ssh
  45   45  0 /usr/bin/scp
       46 +0 /usr/bin/clear
       47 +0 /usr/bin/tput
       48 +0 /usr/bin/getent
       49 +0 /usr/bin/kbd
       50 +0 /usr/bin/loadkeys
  46   51  0 /usr/bin/mkfifo
  47   52  0 /usr/bin/dd
  48   53  0 /usr/bin/i86/ps
  49   54  0 /usr/bin/ps
  50   55  0 /usr/bin/i86/pfiles
  51   56  0 /usr/bin/pfiles
  52   57  0 /usr/bin/vi
  53   58  0 /usr/bin/vim
  54   59  0 /usr/lib/libncurses.so.6
  55   60  0 /usr/lib/libncurses.so.6.0

  56   61  0 /usr/lib/amd64/libncurses.so.6
  57   62  0 /usr/lib/amd64/libncurses.so.6.0
  58   63  0 /usr/lib/lddstub
  59   64  0 /usr/lib/libidn.so.11
  60   65  0 /usr/lib/libidn.so.11.6.15
  61   66  0 /usr/lib/amd64/libidn.so.11
  62   67  0 /usr/lib/amd64/libidn.so.11.6.15
  63   68  0 /usr/bin/ldd
  64   69  0 /usr/bin/i86/truss
  65   70  0 /usr/bin/truss
  66   71  0 /usr/gnu/bin/md5sum
  67   72  0 /usr/bin/md5sum
  68   73  0 /usr/gnu/bin/sha1sum
  69   74  0 /usr/bin/sha1sum

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX