Webgui: improve box, maintenance and date handling

webgui/lib/db.inc

@@ -8,6 +8,20 @@
 
 */
 
+function db_get_setting($sno, $default=NULL) {
+    // TODO WIP
+    global $pdo;
+    $sql = "SELECT valint, valstr FROM settings WHERE userid=0 AND sno=?";
+    $sth = $pdo->prepare($sql);
+    try {
+        $sth->execute([$sno]);
+    } catch (Exception $e) {
+        return $default;
+    }
+    $row = $sth->fetchOne();
+    return $row;
+}
+
 function db_lock_acquire($table, $key, $userid) {
     global $pdo;
     $token = bin2hex(random_bytes(8));