allow plugin options

[simlevesque]

This fixes my issue here: https://github.com/hapijs/glue/issues/75

I use it like this:

{
    registrations: [
        {
            plugin: {
                register: 'k7',
                options: { // server.register({register, OPTIONS}, options)
                    {
                        connectionString: 'mongodb://localhost:27017/xxx',
                        adapter: MongooseK7,
                        models: 'models/*.js'
                    }
                }
            },
            options: { // server.register(plugin, OPTIONS)
                routes: {
                    prefix: '/v1'
                }
            }
        }
    ]
}

[simlevesque]

I didn't add any new test but the old ones still pass.

If you need any help with the tests or you have any question, ask freely.

[simlevesque]

Great, I removed the explicit key in the Joi schema and it works as it should. Thank you for the quick reply !

[csrl]

I'm not sure what the intention of removing the clone of the plugin is for. But doing so breaks expectation that the input parameters do not get modified by the function. ie. the function now has a side affect. If your plugin wants its own copy of the options, then clone the options in your plugin.

[lock[bot]]

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