Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/monitor-bot-disc-space/files/monitor-bot-disc-space.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+# @param $1 mimimum free disc space
+errors=0
+minimum_percent_cleanup_disc_space="$1"
+echo "checking disc space use..."
+df
+for disc_use_percent in $(df --output=pcent | sed 1d)
+do
+    disc_use_percent_number=$(echo "$disc_use_percent" | sed "s/%//")
+    if [ "$disc_use_percent_number" -gt "$minimum_percent_cleanup_disc_space" ]; then
+      echo "WARNING: $disc_use_percent_number exceeds the limit of $minimum_percent_cleanup_disc_space%."
+      errors+=1;
+    fi
+done
+exit $errors;