ITL: Add tempdir attribute to postgres CheckCommand

fixes #13449

doc/10-icinga-template-library.md

@@ -2109,6 +2109,7 @@ postgres_unixsocket  | **Optional.** If "postgres_unixsocket" is set to true, th
 postgres_query       | **Optional.** Query for "custom_query" action.
 postgres_valtype     | **Optional.** Value type of query result for "custom_query".
 postgres_reverse     | **Optional.** If "postgres_reverse" is set, warning and critical values are reversed for "custom_query" action.
+postgres_tempdir     | **Optional.** Specify directory for temporary files. The default directory is dependent on the OS. More details [here](http://perldoc.perl.org/File/Spec.html).
 
 #### <a id="plugin-contrib-command-mongodb"></a> mongodb
 

itl/plugins-contrib.d/databases.conf

@@ -495,6 +495,10 @@ object CheckCommand "postgres" {
 			set_if = "$postgres_reverse$"
 			description = "reverses warning and critical for custom_query action"
 		}
+		"--tempdir" = {
+			value = "$postgres_tempdir$"
+			description = "specify directory for temporary files. default depends on the OS"
+		}
 	}
 
 	vars.postgres_host = "$check_address$"