This is a sub-task of #79. [commandlines](https://github.com/chrissimpkins/commandlines) consider options as arguments. Retrieving pubkey(s) from the configuration: `silkaj amount --gtest` or `silkaj wot --gtest` or with `-p <host>:<port>`. `--gtest` is considered as an argument. Therefore, `--gtest` is the id searched for. I tried to remove `--gtest` from `cli_args.arguments` list, but it stays in `cli_args.arg1`. We have to find a to by-pass that. May be, by reading deeper cmdlines documentation.