Add a Start Span section to the OT Shim. (#2228)
Add a Start Span section to the OT Shim. (#2228)

* Add a Start Span section to the OT Shim.

* Fix link.

* Another link fix.

* Revisit references information.

* Update specification/compatibility/opentracing.md

Co-authored-by: Yuri Shkuro <16e6d622505a30b44c05fb8b6dfd2d798f782d4d@users.noreply.github.com>

Co-authored-by: Yuri Shkuro <16e6d622505a30b44c05fb8b6dfd2d798f782d4d@users.noreply.github.com>
Co-authored-by: Joshua MacDonald <f3bd74e7fbbcca8170a843c74945d604f45dfc0a@users.noreply.github.com>
open-telemetry/opentelemetry-specification,open-telemetry/opentelemetry-specification