Examples in routes{full|minimal}.php should be adjusted to installed router

[weierophinney]

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After the app is installed, the example code in ./config/router.php should reflect the installed router. Currently it always uses a configuration for zend-router. This creates confusion. Als a link to the documentation could be added.

If this gets to complicated, we can add several configuration examples for the different routers, or at least tell the used example is for zend-router and link to the docs.

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Originally posted by @geerteltink at zendframework/zend-expressive-skeleton#272