Fix default value display in the help output.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Return tuple as host-port pairs as ZooKeeper servers instead of a string.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Minor update to help text.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Fix default value display in the help output.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Return tuple as host-port pairs for servers, plus differentiate between --cluster vs --server.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>