Update 3 files

• /src/Plugin/views/query/ViewsCsvQuery.php
• /src/Form/ViewsCsvSourceSettingsForm.php
• /src/Query/Connection.php

Closes #3480952

src/Form/ViewsCsvSourceSettingsForm.php

@@ -37,7 +37,7 @@ class ViewsCsvSourceSettingsForm extends ConfigFormBase {
       '#min' => 0,
       '#size' => 15,
       '#title' => $this->t('Cache Duration (seconds)'),
-      '#description' => $this->t('The duration till when the cache needs to be active.<br>EG: 1 day = 86400 seconds.'),
+      '#description' => $this->t('The duration till when the cache needs to be active (e.g. 1 day = 86400 seconds).<br>This only applies to remote files. Set it to 0 to disable caching (necessary for large files).'),
       '#default_value' => $config->get('cache_ttl'),
     ];