Fix PHP warning when password_hosts is set, but is not an array (#5260)

Aleksander Machniak

2016-05-20 ab6fdfa8bc3a441590778b026b52225473424eec

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ALTER TABLE [dbo].[users] ADD [failed_login] [datetime] NULL 
GO 
ALTER TABLE [dbo].[users] ADD [failed_login_counter] [int] NULL 
GO