- .set -> .header
- 2.x charset feature controled lossy vs encoding_rs.
- No re-exported tls config
- No re-exported cookie API
- No re-exported json macro
- into_string() -> read_to_string()
- native-certs is gone. native roots are always available.
- lossy utf-8 always enabled also when not charset feature
- agent builder
- no retry idempotent (for now)
- no send body charset encoding (for now)