null_byte appended by syslog logger not supported in all siem

[BibekShrestha]

SyslogHandler Module in python has introduced new variable append_nul which controls whether or not null byte should be appended to syslog message.
Since, not all siem vendor support null byte at end of syslog ( especially those that conform to RFC5424), so, an option to control this flag in config would be good feature.

For now, I have made mine work by directly adding
logging_handler.append_nul = False
after creating SyslogHandler in api_client.py.

See Python12168.