add 15 minute feed update interval

diff --git a/backend.php b/backend.php
index 189e89e31caf061173affbc67f8bbf53ab6a837f..35be82cccb0146c25d2469bad2ed7720ac405206 100644 (file)
--- a/backend.php
+++ b/backend.php
@@ -102,6 +102,7 @@
        $update_intervals = array(
                0   => __("Use default"),
                -1  => __("Disable updates"),
+               15  => __("Each 15 minutes"),
                30  => __("Each 30 minutes"),
                60  => __("Hourly"),
                240 => __("Each 4 hours"),