more explanations added for running mode; fix a typo

releng/README

@@ -163,7 +163,7 @@ All general options are accepted.
 The text output of the automatic tests is recorded in file
    releng_generated_data/log.run_all_auto
 
-Script ./run_all_auto will detect failure of perticular tests and report
+Script ./run_all_auto will detect failure of particular tests and report
 lines from the log file which contain problem indicating keywords:
   NEVER,ABORT,FATAL,FAILURE,MISHAP,SORRY,WARNING,HINT,FAIL,ERROR,WRONG
 
@@ -258,8 +258,10 @@ to the general options of the test suite:
 The code piece inc/releng_getopts.inc defines the following functions
 for use by the single tests:
 
-  standalone_or_supervised Initialize the running mode - standalone,
+  standalone_or_supervised This is internally called routine to find
+                           out the running mode of the scripts - standalone,
                            supervised by run_all_auto, or unknown.
+			   No need to call it from the scripts themselves.
 
   print_help        Prints the help text for general options.