-Put in code to nbfs to clear conflicting DHCP leases a mac may hold, to have DDNS happy

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@6519 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-nbroot/overlay/etc/init.d/S10autodetect

@@ -89,9 +89,10 @@ if [ $NEEDEHEA = 1 ]; then
 fi
 
 NICSTOWAIT=`/sbin/ifconfig -a|grep HWaddr|grep ^eth|sed -e 's/ .*//'`
+#run udhcpc in two ways, to flush out leases with uid and leases without uid, and actually use the results of the more 'linux-like' lease, either way, on exit will release all to hold no leases
 for nic in $NICSTOWAIT; do
 	ifconfig $nic up
-	udhcpc -i $nic -b &
+	(udhcpc -i $nic -R -s /bin/true ;kill `ps axf|grep "udhcpc -i $nic -R"|awk '{print $1}'`; sleep 1; udhcpc -i $nic -R -C) &
 done