Values for nel:
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{"report_to":"default","max_age":10886400} 5
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{"report_to":"nel","max_age":84600,"success_fraction":0.01} 3
{"report_to":"cf-nel","max_age":604800} 2
{"report_to": "network-errors", "max_age": 100, "success_fraction": 0.01, "failure_fraction": 1.0} 2
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{"success_fraction":0.0,"failure_fraction":1.0,"report_to":"default","max_age":86400,"include_subdomains":true} 2
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{"report_to":"M","max_age":3600,"failure_fraction":0.1} 1
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