smtp: if multiple recipients are provided by comma separated string, convert them to array

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@3762 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

smtp.php

@@ -172,7 +172,7 @@ class smtp
                            500);
     $from = $this->cleanMail ($from);
     if (is_string ($to))
-      $to = array ($to);
+      $to = explode (",", $to);
     if (! is_array ($to) || count ($to) === 0)
       throw new \Exception ("Can't send mail: no valid recipient provided",
         500);