Elaborate on the function of the "-c" option in the slurmctld man page.

doc/man/man8/slurmctld.8

-.TH SLURMCTLD "8" "October 2002" "slurmctld 0.1" "Slurm components"
+.TH SLURMCTLD "8" "September 2003" "slurmctld 0.2" "Slurm components"
 .SH "NAME"
 slurmctld \- The central management daemon of Slurm.
 .SH "SYNOPSIS"
 \fBslurmctld\fR [\fIOPTIONS\fR...]
 .SH "DESCRIPTION"
-\fBslurmctld\fR is the central management daemon of Slurm. It monitors all other 
-Slurm daemons and resources, accepts work (jobs), and allocates resources to 
-those jobs. Given the critical functionality of \fBslurmctld\fR, there may 
-be a backup server to assume these functions in the event that the primary 
-server fails. 
+\fBslurmctld\fR is the central management daemon of Slurm. It monitors 
+all other Slurm daemons and resources, accepts work (jobs), and allocates 
+resources to those jobs. Given the critical functionality of \fBslurmctld\fR, 
+there may be a backup server to assume these functions in the event that 
+the primary server fails. 
 .TP
 OPTIONS
 .TP
 \fB\-c\fR
 Clear all previous \fBslurmctld\fR state from its last checkpoint. 
+If not specified, previously running jobs will be preserved along 
+with the state of DOWN, DRAINED and DRAINING nodes and the associated 
+reason field for those nodes.
 .TP
 \fB\-D\fR
 Debug mode. Execute \fBslurmctld\fR in the foreground with logging to stdout.