Improve checks for MySQL user's name. #588
Merged
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As per http://dev.mysql.com/doc/refman/5.5/en/identifiers.html , MySQL
allows for more than '\w-'. This commit improves the check to ensure
that:
not a requirement though
I kept 2 checks, but the 2nd one can probably be removed (I can't find a
username which match the 2nd one but not the first.)