Add option for env variable for kafka_saslJaasConfig #276
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#30 added SASL support. Currently, in order to configure SASL plain, I think the best practice for kafdrop would be to configure the appropriate login module in the sasl.jaas.config property in kafka.properties. Something like...
This unfortunately puts user/pw information in plaintext in a file when running directly from a JAR.
Due to the nature of SpringBoot configuration, the change in this PR has the side effect of enabling configuration of the user/pw in the environment (
kafka_saslJaasConfig) and through a command line argument (--kafka.saslJaasConfig) as is currently supported for brokers (kafka_brokerConnect/--kafka.brokerConnect).