make song choice configurable option

booking.admin.inc

@@ -565,6 +565,16 @@ function booking_admin() {
     ),
     '#default_value' => variable_get('booking_enable_roommate', 0)
   );
+  $form['regn_options']['booking_enable_songchoice'] = array(
+    '#type' => 'radios',
+    '#title' => t('Enable attendee to specify song choice?'),
+    '#description' => t('Select whether to include questions about song choice in the booking form.'),
+    '#options' => array(
+      0 => t('No'),
+      t('Yes')
+    ),
+    '#default_value' => variable_get('booking_enable_songchoice', 0)
+  );  
   $form['regn_options']['booking_enable_dietary'] = array(
     '#type' => 'radios',
     '#title' => t('Allow attendee to specify dietary requirements?'),