XXX Remove nawk(1)

*** 68,78 ****
  typeset expect_str1="This system is currently running ZFS filesystem version"
  typeset expect_str2="All filesystems are formatted with the current version"
  typeset expect_str3="The following filesystems are out of date, and can be upgraded"
  typeset -i COUNT OLDCOUNT
  
! $ZFS upgrade | $NAWK '$1 ~ "^[0-9]+$" {print $2}'> $oldoutput
  OLDCOUNT=$( $WC -l $oldoutput | $AWK '{print $1}' )
  
  old_datasets=""
  for version in $ZFS_ALL_VERSIONS ; do
          typeset verfs
--- 68,78 ----
  typeset expect_str1="This system is currently running ZFS filesystem version"
  typeset expect_str2="All filesystems are formatted with the current version"
  typeset expect_str3="The following filesystems are out of date, and can be upgraded"
  typeset -i COUNT OLDCOUNT
  
! $ZFS upgrade | $AWK '$1 ~ "^[0-9]+$" {print $2}'> $oldoutput
  OLDCOUNT=$( $WC -l $oldoutput | $AWK '{print $1}' )
  
  old_datasets=""
  for version in $ZFS_ALL_VERSIONS ; do
          typeset verfs
*** 96,106 ****
  log_must eval '$ZFS upgrade > $output 2>&1'
  
  # we also check that the usage message contains at least a description
  # of the current ZFS version.
  log_must eval '$GREP "${expect_str1} $ZFS_VERSION" $output > /dev/null 2>&1'
! $ZFS upgrade | $NAWK '$1 ~ "^[0-9]+$" {print $2}'> $output
  COUNT=$( $WC -l $output | $AWK '{print $1}' )
  
  typeset -i i=0
  for fs in ${old_datasets}; do
          log_must $GREP "^$fs$" $output
--- 96,106 ----
  log_must eval '$ZFS upgrade > $output 2>&1'
  
  # we also check that the usage message contains at least a description
  # of the current ZFS version.
  log_must eval '$GREP "${expect_str1} $ZFS_VERSION" $output > /dev/null 2>&1'
! $ZFS upgrade | $AWK '$1 ~ "^[0-9]+$" {print $2}'> $output
  COUNT=$( $WC -l $output | $AWK '{print $1}' )
  
  typeset -i i=0
  for fs in ${old_datasets}; do
          log_must $GREP "^$fs$" $output
*** 123,133 ****
  if (( OLDCOUNT == 0 )); then
          log_must eval '$GREP "${expect_str2}" $output > /dev/null 2>&1'
  else
          log_must eval '$GREP "${expect_str3}" $output > /dev/null 2>&1'
  fi
! $ZFS upgrade | $NAWK '$1 ~ "^[0-9]+$" {print $2}'> $output
  COUNT=$( $WC -l $output | $AWK '{print $1}' )
  
  if (( COUNT != OLDCOUNT )); then
          $CAT $output
          log_fail "Unexpect old-version filesystems print out."
--- 123,133 ----
  if (( OLDCOUNT == 0 )); then
          log_must eval '$GREP "${expect_str2}" $output > /dev/null 2>&1'
  else
          log_must eval '$GREP "${expect_str3}" $output > /dev/null 2>&1'
  fi
! $ZFS upgrade | $AWK '$1 ~ "^[0-9]+$" {print $2}'> $output
  COUNT=$( $WC -l $output | $AWK '{print $1}' )
  
  if (( COUNT != OLDCOUNT )); then
          $CAT $output
          log_fail "Unexpect old-version filesystems print out."