feat: Allow file and directory creation modes to be configured

The defaults remain the same as before.
For now, the config options are global instead of per-user.
Note also that the BoltDB creation maintains the old default mode of 0640
since it's not really a user-facing filesystem manipulation.
Fixes #5316, #5200

cmd/config_set.go

@@ -65,6 +65,10 @@ you want to change. Other options will remain unchanged.`,
 				set.Branding.DisableUsedPercentage = mustGetBool(flags, flag.Name)
 			case "branding.files":
 				set.Branding.Files = mustGetString(flags, flag.Name)
+			case "file-mode":
+				set.FileMode = mustGetMode(flags, flag.Name)
+			case "dir-mode":
+				set.DirMode = mustGetMode(flags, flag.Name)
 			}
 		})