v1.18: sleep instead of drop when stream rate exceeded limit; (backport of #939) #990
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Problem
Currently we are dropping the stream right away when the stream rate limit is being exceeded. The problem is the client can retry right away. In addition, the stream might have been received and can be used, dropping it waste resources.
Summary of Changes
Change to sleep instead of drop. Thanks to @alessandrod -- we sleep based on the estimated time to elapse to appease the rate limit and consider the RTT for the connection.
Fixes #
This is an automatic backport of pull request #939 done by [Mergify](https://mergify.com).