Config: Options are taken as arguments

This is a sub-task of #79.

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.