expanded a bit on togglecpu_pstates.sh

dot_local/bin/executable_togglecpu_pstates.sh

@@ -1,10 +1,16 @@
 #!/usr/bin/env bash
 #
+# run something like
+# $ togglecpu_pstates.sh performance
+#
 # script to change the power and cpu throttle governor
 # with new intel_pstates. use at your own risk
 # this also uses the 'old' cpufreq-set to ensure that
 # also the 'old' system is set the same way.
 
+# this script ends with actively showing current frequencies.
+# exit with ctrl+c.
+
 if [[ -z $1 ]]; then
 	echo "error. no argument."
 	echo "use [performance|default|power]"