fix starting h1

docs/20_Checks/check_haproxy_health.md

-# Check HA-Proxy health
-
-## Introduction
+## Check HA-Proxy health
 
 **check_haproxy_health** checks health url of haproxy service.
 The url of it will be detected from /etc/haproxy/haproxy.cfg.

docs/20_Checks/check_haproxy_status.md

-# Check HA-Proxy Status
-
-## Introduction
+## Check HA-Proxy Status
 
 **check_haproxy_health** show status and connections count on frontend and backend.
 This check sends performance data.

docs/20_Checks/check_http.md

-# Check Httpd
-
-## Introduction
+## Check Httpd
 
 Makes an http request with a given method (like HEAD or GET; GET is default).
 Additionally you can verify the response:

docs/20_Checks/check_iml_backup_server.md

-# Check IML backup server
-
-## Introduction
+## Check IML backup server
 
 This check is for IML Backup server.
 This check executes the script 'storage_helper.sh' to get thebackup status.

docs/20_Checks/check_journallog.md

-# Check Systemd unit
-
-## Introduction
+## Check Systemd unit
 
 This check shows the count of written entries in the journallog per minute.
 This check requires access to journalctl.

docs/20_Checks/check_memory.md

-# Check Memory (RAM)
-
-## Introduction
+## Check Memory (RAM)
 
 **check_memory** Check memory usage incl. free, used and total memory.
 
@@ -19,7 +17,7 @@ It reads /proc/meminfo and fetches the needed values.
 
 This plugin sends all values as performance data.
 
-### Requirements
+## Requirements
 
 * bc
 

docs/20_Checks/check_mysqlserver.md

-# check Mysql / mariadb server
-
-## Introduction
+## Check Mysql / mariadb server
 
 **check_mysqlserver** is a plugin execute different checks on a mysql server instance.
 The kind of check is defined by a parameter `-m METHOD`.

docs/20_Checks/check_netio.md

-# check_netio
-
-## Introduction
+## Check_netio
 
 Show network io for all or selected interfaces.
 
 This plugin scans `/proc/net/dev` with the regex `eth|en[ops][0-9]*` to show a few types of interfaces.
 
-### Requirements
+## Requirements
 
 * none
 

docs/20_Checks/check_netstat.md

-# check netstat
-
-## Introduction
+## Check netstat
 
 Count number of network connections.
 

docs/20_Checks/check_onehost.md

-# check OpenNebula hosts
-
-## Introduction
+## Check OpenNebula hosts
 
 **check_onevm** is a plugin to show count of hosts in OpenNebula and warn if a host is down.
 

docs/20_Checks/check_onevm.md

-# Check OpenNebula virtual machines
-
-## Introduction
+## Check OpenNebula virtual machines
 
 **check_onevm** is a plugin to show count of vms in OpenNebula - listed by state and by host.
 

docs/20_Checks/check_opencpu.md

-# check_opencpu
-
-## Introduction
+## Check_opencpu
 
 Test if OpenCpu is available via http and test if given packages are installed.
 

docs/20_Checks/check_packages2install.md

-# check_packages2install
-
-## Introduction
+## 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
-
-## Introduction
+## Check_php-fpm-status
 
 The check fetches several counters from php-fm-status page.
 
-### Requirements
+## Requirements
 
 * wget
 * running PHP FPM service

docs/20_Checks/check_proc_mem.md

-# Check memory consuming processes
-
-## Introduction
+## Check memory consuming processes
 
 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
-
-## Introduction
+## Check process resources regarding cpu and memory
 
 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
-
-## Introduction
+## 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
-
-## Introduction
+## Check PostgreSql server
 
 **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
-
-## Introduction
+## Check Rear backup
 
 This check can verify the age of all iso files in the backup target directory.
 

docs/20_Checks/check_reboot_required.md

-# Check Reboot required
-
-## Introduction
+## Check Reboot required
 
 Check if a reboot is required.
 It works for Centos and Debian/ Ubuntu.