3.8.13
configure: make it possible to toggle HPKE support
hpke/hpke-builders: use a relative include
Replaced buf+size pairs with datum
hpke-key-management: use memcmp instead of manual comparison
hpke: give all additional information to encap/decap at once
Created separate HPKE module
hpke: rework public key serialization logic with existing facilities