Fix ip_allow optional methods specification #10246
Merged
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According to doc, the
methodsfield is optional so the following should be a valid ip_allow config which allows all HTTP methods:However, ATS reports an error when parsing it.
The root cause is that yaml-cpp returns an invalid node for non-existent keys, which is fine, but it throws an exception when assigning the invalid node to another node. This PR prevents this and adds a test to exercise this case.