update docs

docs/20_Checks/check_onehost.md

 ## Check OpenNebula hosts
 
+Script: `check_onehost`
+
 **check_onevm** is a plugin to show count of hosts in OpenNebula and warn if a host is down.
 
 ## Requirements

docs/20_Checks/check_onevm.md

 ## Check OpenNebula virtual machines
 
+Script: `check_onevm`
+
 **check_onevm** is a plugin to show count of vms in OpenNebula - listed by state and by host.
 
 The version 1.4 identifies these status values:

docs/20_Checks/check_opencpu.md

 ## Check_opencpu
 
+Script: `check_opencpu`
+
 Test if OpenCpu is available via http and test if given packages are installed.
 
 ### Requirements

docs/20_Checks/check_packages2install.md

 ## Check_packages2install
 
+Script: `check_packages2install`
+
 Check available package updates.
 Found updates will be shown in groups.
 

docs/20_Checks/check_php-fpm-status.md

 ## Check_php-fpm-status
 
+Script: `check_php-fpm-status`
+
 The check fetches several counters from php-fm-status page.
 
 ## Requirements

docs/20_Checks/check_proc_mem.md

 ## Check memory consuming processes
 
+Script: `check_proc_mem`
+
 Show processes that consume the most memory.
 You get a list with process name, total usage of all its processes, count of instances.
 

docs/20_Checks/check_proc_ressources.md

 ## Check process resources regarding cpu and memory
 
+Script: `check_proc_ressources`
+
 Show processes that consume the most memory or cpu.
 You get a list with usage, process id and process
 

docs/20_Checks/check_proc_zombie.md

 ## Check_proc_zombie
 
+Script: `check_proc_zombie`
+
 **check_proc_zombie** is a plugin to show the count of zombie processes.
 It sends performance data.
 

docs/20_Checks/check_psqlserver.md

 ## Check PostgreSql server
 
+Script: `check_psqlserver`
+
 **check_psqlserver** is a plugin execute different checks on a postgreSql server instance.
 The kind of check is defined by a parameter `-m METHOD`.
 

docs/20_Checks/check_rearbackup.md

 ## Check Rear backup
 
+Script: `check_rearbackup`
+
 This check can verify the age of all iso files in the backup target directory.
 
 ## Requirements

docs/20_Checks/check_reboot_required.md

 ## Check Reboot required
 
+Script: `check_reboot_required`
+
 Check if a reboot is required.
 It works for Centos and Debian/ Ubuntu.
 

docs/20_Checks/check_requirements.md

 ## Check_requirements
 
+Script: `check_requirements`
+
 **check_requirements** is a plugin to run different check to show the ability to run an application. You can these checks
 
 * Check if a process exists

docs/20_Checks/check_smartstatus.md

 ## Check_smartstatus
 
+Script: `check_smartstatus`
+
 **check_smartstatus** is a plugin run a smartctl check to verify the disk status of all local harddisks/ ssds.
 
 It works on physical machines only.

docs/20_Checks/check_snmp_data.md

 ## Check SNMP data
 
+Script: `check_snmp_data`
+
 **check_snmp_data** is a plugin for fetching performance data with a set of given OIDs.
 
 It can handle current values (i.e. load / cpu usage / disc usage) and counter values (i.e. network io).

docs/20_Checks/check_snmp_synology.md

 ## Check SNMP Synology
 
+Script: `check_snmp_synology`
+
 **check_snmp_data** is a plugin to check the status of a Synology storage using snmp v2 or v3.
 
 ## Syntax

docs/20_Checks/check_ssl_certs.md

 ## Check ssl certs
 
+Script: `check_ssl_certs`
+
 **check_ssl_certs** is a plugin to check local certificats.
 
 It loops over 1 or multiple certificate files and reads the expiration date from is.

docs/20_Checks/check_systemdunit.md

 ## Check Systemd unit
 
+Script: `check_systemdunit`
+
 This check shows the status of a systemd unit.
 
 A unit is everything listed by systemctl command - services, timers, targets, ...