Merge pull request #1380 from joeykay9/patch-2

Apply suggestion from @jskeet

Update kafka-protocol-binding.md

Merge pull request #1378 from duglin/issue1377

fix typo

Merge pull request #1376 from duglin/cleanup

Clean-up old issues

Merge pull request #1374 from ktKongTong/patch-1

Fix link formatting in zh-CN spec.md

Merge pull request #1370 from duglin/issue1369

Ensure `traceparent` isn't an empty string

Merge pull request #1366 from yordis/yordis/fixes-1364

Improve sequence extension documentation

Merge pull request #1362 from duglin/fixup

remove a file that was added by mistake