Fix so task name can really contain all from a-z0-9_- characters (#1488941)

Aleksander Machniak

2013-03-10 8b771646fadcde0abb27c2218a45942b95734838

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-- Updates from version 0.7-beta
 
ALTER TABLE `session` CHANGE `sess_id` `sess_id` varchar(128) NOT NULL;