Avoid undefined backupable mods to be exported

backup/backup_execute.html

@@ -22,7 +22,8 @@
             //Check module info
             $var = "backup_".$modname;
             if (!isset($$var)) {
-                $$var = 1;
+                //Every undefined backup_XXXX isn't exported
+                $$var = 0;
             }
             //Now stores all the mods preferences into an array into preferences
             $preferences->mods[$modname]->backup = $$var;

backup/lib.php

@@ -206,7 +206,7 @@
         global $CFG; 
 
         //Change this if you want !!
-        $days = 1;
+        $days = 2;
         //End change this
         $seconds = $days * 24 * 60 * 60;
         $delete_from = time()-$seconds;