XXX Remove nawk(1)

*** 61,71 ****
          /usr/bin/pkill -z `/sbin/zonename` -x pppd && sleep 1
          /usr/bin/pkill -z `/sbin/zonename` -x pppoed
  
          # Use ifconfig to make the interfaces down just in case
          if [ -f $PPPDIR/ifconfig ]; then
!                 nawk '/ifconfig[        ]*sppp/ { \
                          system("ifconfig " $2 " down"); \
                          system("ifconfig " $2 " unplumb"); \
                          next; \
                  } \
                  /ifconfig/ { \
--- 61,71 ----
          /usr/bin/pkill -z `/sbin/zonename` -x pppd && sleep 1
          /usr/bin/pkill -z `/sbin/zonename` -x pppoed
  
          # Use ifconfig to make the interfaces down just in case
          if [ -f $PPPDIR/ifconfig ]; then
!                 /usr/xpg4/bin/awk '/ifconfig[   ]*sppp/ { \
                          system("ifconfig " $2 " down"); \
                          system("ifconfig " $2 " unplumb"); \
                          next; \
                  } \
                  /ifconfig/ { \