Added missing descriptions: Chapter 150-170

Signed-off-by: mrgarris0n <gergely.karacsonyi@gmail.com>

Author: mrgarris0n

doc/_admin-guide/150_Statistics_of_syslog-ng/000_Metrics_and_counters.md

@@ -1,6 +1,8 @@
 ---
 title: Metrics and counters of {{ site.product.short_name }}
 id: adm-stats-metrics
+description: >-
+	This section describes how to display metrics in {{ site.product.short_name }}.
 ---
 
 You can list all active metrics on your {{ site.product.short_name }} host using the

doc/_admin-guide/170_Troubleshooting_syslog-ng/004_Stopping_syslog-ng.md

@@ -1,9 +1,9 @@
 ---
 title: Stopping syslog-ng
 id: adm-debug-stop
+description: >-
+	To avoid problems, always use the init scripts to stop {{ site.product.short_name }}
+	(`/etc/init.d/syslog-ng stop`), instead of using the kill command.
+	This is especially true on Solaris and HP-UX systems, here use
+	`/etc/init.d/syslog stop`.
 ---
-
-To avoid problems, always use the init scripts to stop syslog-ng
-(`/etc/init.d/syslog-ng stop`), instead of using the kill command.
-This is especially true on Solaris and HP-UX systems, here use
-`/etc/init.d/syslog stop`.

doc/_admin-guide/170_Troubleshooting_syslog-ng/009_Error_messages.md

@@ -1,10 +1,10 @@
 ---
 title: Error messages
 id: adm-debug-err
+description: >-
+	This section describes the most common error messages of {{ site.product.short_name }}.
 ---
 
-This section describes the most common error messages.
-
 ## Destination queue full
 
 | Error message: | Destination queue full, dropping messages; queue_len='10000', log_fifo_size='10000' count='4',    persist_name='afsocket_dd_qfile(stream,serverdown:514)' |

doc/_admin-guide/170_Troubleshooting_syslog-ng/010_SELinux.md

@@ -2,6 +2,8 @@
 title: SELinux prevents {{ site.product.short_name }} from using the execmem access on a process
 short_title: Using execmem prevented by SELinux
 id: adm-debug-selinux
+description: >-
+	This section describes how to resolve when SELinux prevents {{ site.product.short_name }} from using the execmem access on a process.
 ---
 
 If you are using a recent enough PCRE library, {{ site.product.short_name }} will

doc/_admin-guide/170_Troubleshooting_syslog-ng/README.md

@@ -3,7 +3,7 @@ title: Troubleshooting syslog-ng
 id: adm-debug
 description: >-
     This chapter provides tips and guidelines about troubleshooting problems
-    related to syslog-ng.
+    related to {{ site.product.short_name }}.
 ---
 
 - As a general rule, first try to log the messages to a local file.