Improves compatibility with libressl, wolfssl and older openssl
libraries not having the flag. Usage of this is optional as it's
purely performance optimization related flag.
- basic digesting and signing apis (subject still to fine tuning)
- update digest code, and adb signing for the thin wrapping layer
- old v1 package and database handling not updated
- default mkpkg file hash to sha256
ref #10744
Timo Teräs