Added note about possible failure and workaround for pipe sources.

Signed-off-by: Zsolt Gyulai (zgyulai) <zsolt.gyulai@quest.com>

Author: zsoltgyulai94

_includes/doc/admin-guide/options/create-dirs.md

@@ -5,3 +5,6 @@
 
 *Description:* Enable creating non-existing directories when creating
 files or socket files.
+
+**NOTE:** If syslog-ng cannot create the pipe, it aborts and produces an error. This could be caused by the lack of a write permission, or missing directory. The latter of the two can be fixed by using the `create-dirs(yes)` option.
+{: .notice--info}