Change proctrack/sid reference to proctrack/pgid

doc/man/man5/slurm.conf.5

@@ -244,7 +244,7 @@ Identifies the plugin to be used for process tracking.
 The slurmd daemon uses this mechanism to identify all processes 
 which are children of processes it spawns for a user job. 
 Acceptable values at present include "proctrack/aix" (which 
-is the default for AIX systems) and "proctrack/sid" (which 
+is the default for AIX systems) and "proctrack/pgid" (which 
 is the default for all other systems).
 The slurmd daemon must be restarted for a change in ProctrackType 
 to take effect.