* http3: reject pseudo header fields in trailers
As defined in section 4.3 of RFC 9114.
* http3: improve allocs for trailer map
* http3: rename connection.parseTrailer to decodeTrailers
This package implements HTTP/3 (RFC 9114), including QPACK (RFC 9204) and HTTP Datagrams (RFC 9297).
It aims to provide feature parity with the standard library's HTTP/1.1 and HTTP/2 implementation.
Detailed documentation can be found on quic-go.net.