MD API deprecation: ChangeLog updates
MD API deprecation: ChangeLog updates

Use the updated names for the new functions (xxx_ret instead of xxx_ext).

List the new deprecations in the appropriate sections.

Credit the independent report of the misuse of zeroizing to reset a
hash context in entropy.c.

Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,NXPmicro/mbedtls,NXPmicro/mbedtls,NXPmicro/mbedtls,Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls