Corrected bug in cron job logging and added wget output log (only of last job)

Marius Cramer

2014-02-18 b26653b94563f4bd89a5fffe5a97cebfae6855ff

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ALTER TABLE `web_domain` ADD `last_quota_notification` DATE NULL DEFAULT NULL;
ALTER TABLE `mail_user` ADD `last_quota_notification` DATE NULL DEFAULT NULL;