Merge branch 'stable-3.1' into 'stable-3.1'

Marius Burkard

2016-06-03 bd4c2e96fd4566bfcd8042f82ccac090419734a3

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amavis unix - - - - 2 smtp
        -o smtp_data_done_timeout=1200
        -o smtp_send_xforward_command=yes