Can't set a controller map template replacement to an empty string

[michalbundyra]

The Inject template listener allows specifying a controller_map to map namespaces or specific controllers to directories. It is not currently possible to specify a mapping for a namespace to '' eg:

'controller_map' => [
    'my/long/namespace' => '',
]

This is due to a == comparison with false in the listener on line 142: https://github.com/zendframework/zend-mvc/blob/f46acd021a0d571bc5df400bdd55243adc53580e/src/View/Http/InjectTemplateListener.php#L142 which should probably be ===

Fixing this may break BC...

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Originally posted by @carnage at https://github.com/zendframework/zend-mvc/issues/12

[michalbundyra]

Suggestions:

• proposed fix is a bc break, no-go, even for 3.x (it is subtle)
• use a separate listener for this functionality, and make it act with a lower priority (should be BC compliant then)

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Originally posted by @Ocramius at https://github.com/zendframework/zend-mvc/issues/12#issuecomment-120876057