update doc page for netstat

docs/20_Checks/check_netstat.md

@@ -10,11 +10,13 @@ Count number of network connections.
 > ./check_netstat -h
 ______________________________________________________________________
 
-CHECK_NETSTAT 
-v1.1
+CHECK_NETSTAT
+v1.2
 
 (c) Institute for Medical Education - University of Bern
 Licence: GNU GPL 3
+
+https://os-docs.iml.unibe.ch/icinga-checks/Checks/check_netstat.html
 ______________________________________________________________________
 
 Count number of network connections.
@@ -22,18 +24,20 @@ Count number of network connections.
 SYNTAX:
 check_netstat [ -w value -c value -h ]
 
-    -w VALUE       cpu usage warning level  (default: 75)
-    -c VALUE       cpu usage critical level (default: 90)
+    -w VALUE       warning level for connectios total
+    -c VALUE       critical level
     -h or --help   show this help.
 
 PARAMETERS:
 
     None.
 
-EXAMPLE:
-check_netstat -w 60 -c 80 -p 40
-
-If there is no -w and -c then the result is always OK.
+EXAMPLES:
+check_netstat      Show count of current connections
+                   If there is no -w and -c then the result is always OK.
+check_netstat -w 400 -c 500
+                   Show count of connections incl. limits for warning
+                   and critical.
 
 ```