[Web] Filter duplicates when adding multiple transports

data/Dockerfiles/rspamd/docker-entrypoint.sh

@@ -1,8 +1,5 @@
 #!/bin/bash
 
-echo "Waiting for PHP to settle..."
-sleep 10
-
 until nc phpfpm 9001 -z; do
   echo "Waiting for PHP on port 9001..."
   sleep 3

data/web/inc/functions.transports.inc.php

@@ -243,7 +243,7 @@ function transport($_action, $_data = null) {
           }
         }
       }
-      $destinations = array_values($destinations);
+      $destinations = array_values(array_unique($destinations));
       if (empty($destinations)) { return false; }
       if (isset($next_hop_matches[1])) {
         if (in_array($next_hop_clean, $existing_nh)) {