-l, –log-level=<level >

Set logging threshold level.
All logging events with priority <= <level >
will be logged. All others will be ignored.
Error events are always logged.
<level > is one of:

'off' or 0	Disable all logging.
'error' or 1	Enable error logging.
'diag1' or 2	Enable diagnostics 1 logging.
'diag2' or 3	Enable diagnostics 2 logging.
'diag3' or 4	Enable diagnostics 3 logging.
'diag4' or 5	Enable diagnostics 4 logging.
'diag5' or 6	Enable diagnostics 5 logging.
>6	Enable user-defined logging.

DEFAULT: off

–logfile=<file>

Set logfile <file>.

DEFAULT: stderr

–help

Display help and exit.

–version

Display mire version number and exit.