Bypassing rdkafka config
Added RB_UNUSED to unused parameters in msg_delivered
FIX: const-warnings and error parsing rdkafka arguments
FIX 2 warnings
Added kafka_log_post_proxy()
Deleted kafka_debug config parameter. Not used anymore
Commented out verifications in kafka_proxy_post. Not used at the moment.
rlm_kafka now uses rbutils strbuffer
Added kafka_log config file