红帽全球峰会1.21.7. 3scale Istio Adapter APIcast emulation
当出现以下情况时，3scale Istio Adapter 会以 APIcast 的形式执行：
- 当请求无法与定义的任何映射规则匹配时，返回的 HTTP 代码为 404 Not Found。之前是 403 Forbidden。
- 当一个请求因为超过限制而被拒绝时，返回的 HTTP 代码为 429 Too Many Requests。之前是 403 Forbidden。
-
在通过 CLI 生成默认模板时，对于标头使用下划线而不是横线，例如：
user_key而不是user-key。
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