add tooltip to option

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_external/lib/Lib/Backend/SMB.php

@@ -58,7 +58,8 @@ class SMB extends Backend {
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 				(new DefinitionParameter('check_acl', $l->t('Verify ACL access when listing files')))
 					->setType(DefinitionParameter::VALUE_BOOLEAN)
-					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL)
+					->setTooltip($l->t("Check the ACL's of each file or folder inside a directory to filter out items where the user has no read permissions, comes with a performance penalty")),
 				(new DefinitionParameter('timeout', $l->t('Timeout')))
 					->setType(DefinitionParameter::VALUE_HIDDEN)
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),