Fix log injection warn logs and b3 env vars #1229
Merged
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This PR addresses #1226 as well as some residual followup from #1205.
It updates environment variables for B3 Header Inject and Extract to fit broader datadog specification and what's in documentation, updating from
DD_PROPAGATION_INJECT_STYLE
andDD_PROPAGATION_EXTRACT_STYLE
toDD_PROPAGATION_STYLE_INJECT
andDD_PROPAGATION_STYLE_EXTRACT
, respectively.It also cleans up a case in the rails trace context auto-injection feature where a warning log would occur erroneously.