Add draft release notes for LLNL system administrators

RELEASE_NOTES_LLNL

+LLNL-SPECIFIC RELEASE NOTES FOR SLURM VERSION 2.0
+19 February 2009
+
+For processor-scheduled clusters (*not* allocating whole nodes to jobs):
+Set "DefMemPerCPU" and "MaxMemPerCPU" as appropriate to restrict memory 
+available to a job. Also set "JobAcctGatherType=jobacct_gather/linux"
+for enforcement (periodic sampling of memory use by the job).
+
+Configure "TaskPlugin=task/affinity" and remove the "auto-affinity.so"
+SPANK plugin with equivalent functionality.
+
+Remove the "preserve-env.so" SPANK plugin. The functionality is now
+directly in SLURM.
+
+SLURM version 2.0 must use a database daemon (slurmdbd) at version 2.0
+or higher. While we are testing version 2.0, set "AccountingStoragePort=????".
+Once we upgrade the production slurmdbd to version 2.0, this change will
+not be required. 
+
+SLURM state files in version 2.0 are different from those of version 1.3.
+After installing SLURM version 2.0, plan to restart without preserving 
+jobs or other state information. While SLURM version 1.3 is still running, 
+cancel all pending and running jobs (e.g.
+"scancel --state=pending; scancel --state=running"). Then stop and restart 
+daemons with the "-c" option or use "/etc/init.d/slurm startclean".