Encoded backslash in route parameter

[weierophinney]

In Apigility documentation url contains module name. We added to generated module name own namespace. After this documentation has stopped working. We have found that problem is there https://github.com/zfcampus/zf-apigility-documentation/blob/master/config/module.config.php#L17 and we change regex to [a-zA-Z][a-zA-Z0-9_\\\\]+ what should cover namespace (MyNamespace\ApiName). However it doesn't work. One of working solution is [a-zA-Z][a-zA-Z0-9_%]+

First time reported in zendframework/zendframework#7409

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Originally posted by @snapshotpl at zfcampus/zf-apigility-documentation#28