Issues with multi word options

[tf]

When declaring options like

on '--redis-host'

the member set on the options OpenStruct is redis-host which is not a valid Ruby identifier. It thus has to be accessed as options['redis-host']. Even worse on Ruby 1.9 - if one still wishes to support that - OpenStruct does not implement []. So one has to resort to options.send('redis-host').

I'd suggest to always also set redis_host, i.e. the option name with hyphens replaced by underscores, so that multi word options can be accessed as options.redis_host