add support for action dispatch request id generation #115
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Rails 3.2 and later have
ActionDispatch::RequestId
in the middleware stack.Rack::Timeout
middleware doesn't currently support re-using the request id generated by this middleware in Rails. This PR adds support for that.Also changes the format of a generated uuid to be a proper type 4 uuid, like nginx, heroku, etc generate for the request id header.
Should have no impact on non-rails applications.