• update qtls (for Go 1.15, 1.16 and 1.17rc1) to include the fix for the crypto/tls panic (see https://groups.google.com/g/golang-dev/c/5LJ2V7rd-Ag/m/YGLHVBZ6AAAJ for details)
• fix busy-looping caused by a certain loss pattern #3231

quic-go now supports RFC 9000!

• fixes the way packets are padded by using PADDING frames instead of random data outside the QUIC packet (#2876), which could lead to invalid packets for very short server certificates
• fixes usage of the syscall package (#2886)

• adds support for QUIC draft-32 (draft-29 is still supported)
• add DialEarlyContext and DialAddrEarlyContext (#2814)
• increase the kernel UDP receive buffer size (#2791)
• add support for HTTP CONNECT (#2761)
• read ECN bits and send ECN counts in ACK frames (#2741)
• fix busy looping when using OpenStreamSync (#2824)
• fix QPACK static table entry (#2845)

... and a lot more

• adds support for Go 1.15 (Go 1.14 is also still supported)
• doesn't change support QUIC versions (i.e. is wire-compatible with v0.17.x release)
• adds a new logging / tracing interface, see logging.Tracer

Please note the release notes of the v0.17.3 release when upgrading a deployment that uses both quic-go clients and servers.