Transport Kafka - support mTLS

[coredump17]

Is your feature request related to a problem? Please describe.
our brokers use mTLS. I would like to use goflow2 with a client certificate that can be authenticated on the brokers

Describe the solution you'd like
Allow client certificate and key to be used in kafka TLS connection. file locations and key password should be able to be passed in as command line options

Describe alternatives you've considered
pmacct

[lspgn]

Hi @coredump17,
Thank you for the suggestion.
This should be doable and will try to address it in the coming days/weeks.

[lspgn]

Would you be able to try #367