update docs for snmp_data

docs/20_Checks/check_snmp_data.md

@@ -25,11 +25,13 @@ Start the script without parameter to get the help.
 ```txt
 ______________________________________________________________________
 
-CHECK_SNMP_DATA 
-v0.8
+CHECK_SNMP_DATA
+v1.0
 
 (c) Institute for Medical Education - University of Bern
 Licence: GNU GPL 3
+
+https://os-docs.iml.unibe.ch/icinga-checks/Checks/check_snmp_data.html
 ______________________________________________________________________
 
 SNMP performance data of Synology storages.
@@ -46,17 +48,17 @@ PARAMETERS:
     -f FILE
         read authentication from config file
         default: "/etc/icinga2/snmp.cfg"
-    -m  method         what to show
-                       method is one of ...
-                          about      About... general device infos                     
-                          cpu        CPU usage                                         
-                          load       System load                                       
-                          mem        Memory status                                     
-                          netio      Network IO                                        
-                          synodisc   Synology Disc usage                               
-                          synotemp   Synology NAS temperature                          
-                          synoio     Synology Space IO                                 
-    -v                 verbose output
+    -m  METHOD
+        what to show; METHOD is one of ...
+            about      About... general device infos                     
+            cpu        CPU usage                                         
+            load       System load                                       
+            mem        Memory status                                     
+            netio      Network IO                                        
+            synodisc   Synology Disc usage                               
+            synotemp   Synology NAS temperature                          
+            synoio     Synology Space IO                                 
+    -v  verbose output
 
 CONFIG FILE:
     The config file can be multiline and has the syntax
@@ -69,7 +71,6 @@ CONFIG FILE:
 EXAMPLE:
     check_snmp_data -h 192.168.100.12 -v -m cpu
 
-
 ```
 
 ## Examples