- Initialize the log at the start of ipmi_main() to allow for proper
logging at the start;
- Remove the unused log_level_get() function;
- Update log_level_set() to take verbosity instead of log level
(default verbosity is 0, which is LOG_NOTICE log level),
use the function to update log level as `-v` is encountered
in command line;
- Move IANA PEN list debugging to verbosity 6. The list is too long
to see it in each debug output of verbosity 5 that is used for
debugging lan/lanplus packets;
- For verbosity >= 2 (that is `-vv`) add the ipmitool version
information at the start.
Signed-off-by: Alexander Amelkin <alexander@amelkin.msk.ru>