upstream: flb_upstream_conn busy flag addition #4125
Merged
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This PR is the replacement of PR #4124 which injected the busy flag state changes at the wrong places without taking TLS in consideration which was pointed out by krispraws, it was recreated instead of making another commit to keep the commit log tidier.
This is the original PR message :
This PR addresses what was discussed in PR #4107 as a simple way to delay the disposal of flb_upstream_conn instances before the coroutine is done using it.
Signed-off-by: Leonardo Alminana [email protected]