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This PR updates the underlying http2 transport to the latest version, which includes support for ping frames. As a default, ping frames will be sent every 15 seconds after inactivity to check on the health of a connection, and the connection will be marked dead if the ping frame does not return.
The 15 second default can be changed if needed by setting the
ReadIdleTimeout
var.For those that had timeouts (#24) this should help with flakey connections, as you shouldn't have to recreate the underlying connection because the transport will handle this for you.