Add a conf file for the Kafka MQ plugin, suitable for package install.

etc/trackrdr-kafka.conf

+# Configure the Kafka implementation of the trackrdrd MQ interface.
+# This file configures both the messaging plugin and the librdkafka
+# client lib.
+#
+# see: man libtrackrdr-kafka
+#      https://github.com/edenhill/librdkafka/blob/master/CONFIGURATION.md
+
+# Log file for the MQ plugin and librdkafka
+mq.log = /var/log/libtrackrdr-kafka.log
+
+# librdkafka configuration for an initial list of brokers.
+# Comma-separated list of host:port.
+# Either this item of zookeeper.connect MUST be set.
+metadata.broker.list = 127.0.0.1:9092
+
+# Name of the Kafka topic to which messages are sent.
+topic = tracking
+
+# Comma-separated list of host:port specifying zookeeper servers
+# from which an initial list of brokers is obtained.
+# Either this item or metadata.broker.list MUST be set.
+# zookeeper.connect = 127.0.0.1:2181
+
+# Timeout for connections to zookeeper servers.
+# 0 to fail immediately if servers cannot be reached.
+# zookeeper.connection.timeout.ms = 0
+
+# Log file for the zookeeper client.
+# zookeeper.log = /var/log/libtrackrdr-zoo.log
+
+# log_level is a numeric "severity" for syslog: 6=info, 7=debug
+# see: RFC 5424, section 6.2.1, table 2
+# log_level = 6
+
+# debug classes for librdkafka
+# see rdkafka CONFIGURATION.md for possible values
+# debug = all
+
+# Log stats from the MQ plugin and librdkafka at this interval.
+# 0 disables stats logging.
+# statistics.interval.ms = 0
+
+# Message compression
+# compression.codec = none
+
+# Attempt to query the kafka client protocol version from the broker.
+# For broker versions >= 0.10.0, this may enable the use of a more
+# efficient protocol.
+# api.version.request = false
+
+# Timeout for worker threads to wait for message delivery acks before shutdown.
+# If 0, wait indefinitely.
+# worker.shutdown.timeout.ms = 1000
+
+# Whether to log the offending message when shard keys are missing or
+# illegal, or when the message payload is empty.
+# If false, only log an error message.
+# log_error_data = false