add support for multipath (draft-05) #559
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…rded, as we have done
…ps h3 fuzzer of h2o
…ted" when multipath is used
…m_paths` is used in the anticipation of merging multipath #559
[examples-echo] immediate means now, not 1 second later
…er-for-control-frames make certain MAX_DATA and MAX_STREAMS frames are sent
support ECN
…omplete. H2O opens the HTTP/3 control stream when the connection is created. As that happens before the peer grants any stream credit, QUICLY_PENDING_FLOW_OTHERS_BITgets set, and that leads to `quicly_get_first_timeout` return zero whenever there is space in CWND. But because write keys for the application packet number space is unavailable, `quicly_send` cannot make progress. Hence the hot loop. This PR fixes `quicly_get_first_timeout`. The function no longer returns `0` (indicating now) when the write keys for the application packet number space is available.
fix entering hot loop if app opens a stream before the handshake is complete (amends #551)
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This pull request adds support for multipath QUIC (draft-05).
Known limitations:
For readability, the base branch of this PR points to #554, but the plan is to merge the two at once.