Breaking Changes:

• The Connection now takes a generic BufFactory. A default factory is provided, so in practice this shouldn't affect applications, but it's potentially a breaking change.

Highlights:

• Added experimental APIs for providing custom buffer allocators (see accept_with_buf_factory() and connect_with_buffer_factory()), and related "zero-copy" stream send operations.
• Many more bug fixes and performance improvements.

Full changelog at https://github.com/cloudflare/quiche/compare/0.23.7...0.24.0