proc_zombie: add doc

check_proc_zombie

@@ -26,10 +26,6 @@ SYNTAX:
 
   check_proc_zombie [-h] [-w WARNLIMIT] [-c CRITICALLIMIT]
 
-    -h  this help
-    -w  Warning level
-    -c  Critical level
-
 OPTIONS:
 
   -h, --help

docs/20_Checks/check_proc_zombie.md

+# Check_proc_zombie
+
+## Introduction
+
+**check_proc_zombie** is a plugin to show the count of zombie processes.
+It sends performance data.
+
+## Requirements
+
+* `ps`
+* `top`
+
+## Syntax
+
+```txt
+$ check_proc_zombie -h
+______________________________________________________________________
+
+CHECK_PROC_ZOMBIE
+v1.2
+
+(c) Institute for Medical Education - University of Bern
+Licence: GNU GPL 3
+
+https://os-docs.iml.unibe.ch/icinga-checks/Checks/check_proc_zombie.html
+______________________________________________________________________
+
+SYNTAX:
+
+  check_proc_zombie [-h] [-w WARNLIMIT] [-c CRITICALLIMIT]
+
+OPTIONS:
+
+  -h, --help
+      show help
+
+  -c, --critical VALUE
+      critical value; default: 10 
+
+  -w. --warning VALUE
+      warning limit value; default: 1 
+
+EXAMPLE:
+
+  check_proc_zombie -w 3 -c 15
+      Show count of zombie processes mark as critical when there are 15 or
+      more zombie processes and warn on 3 or more.
+
+```
+
+### Parameters
+
+(none)
+
+## Examples
+
+`$ check_ceph_diskfree` returns
+
+```txt
+OK: 0 ZOMBIE-Processes (total: 392 - running: 2 - sleeping: 390 - stopped: 0)
+ |proc-zombie=0;1;10;0
+```