Allow multiple verbs for a service method

[Kaliumhexacyanoferrat]

As a developer of a web service, I would like a service method to be called for multiple verbs (or even any), so that I can use the same logic without the need of adding multiple methods.

Example

[ResourceMethod([RequestMethod.Post, RequestMethod.Put])]

... or ...

[ResourceMethod(RequestMethod.Post)]
[ResourceMethod(RequestMethod.Put)]

Acceptance criteria

• Multiple verbs can be used by the same method
• Some kind of Any mechanism is implemented
• The feature is documented on the GenHTTP website
• The feature is covered by acceptance tests