Clarify usage of boolean Options

The Quick start sample in Readme.md gives the impression that boolean parameter can be specified with either a true or false value. However my attemps have given the following:

- whenever the parameter exists on the commandline the value will always be true
- omitting the parameter will set it to tits default value.
- trying to specify either True or False as value is ignored.
- having default value of true will always have the Option value set to true

Is this how it is supposed to work?

Start with the Quick start sample in Readme.md and compare its boolean option syntax with the behavior described in the issue. Check the relevant command-line option documentation or examples to establish the supported forms and defaults. Done means the sample and accompanying explanation no longer imply unsupported true/false value handling.

Escrita pelo modelo de indexação a partir do texto da issue.