openssl list -cipher-algorithms
openssl list -cipher-commands

    For the currently supported  message digest algorithms issue the command
        verb(
    openssl list -digest-commands
        )
    For the currently supported  message cipher algorithms issue the command
        verb(
    openssl list -cipher-commands
        )
    The defaults used by tt(HMacBuf) constructors are the tt(sha256) digest
algorithm and the tt(aes-128-cbc) cipher algorithm.

------------------------------------------------------------------------
Future release: remove CryptBuf

Provide examples in the following man-pages:
    milter.yo

>>> to be used by other build scripts:
>>> hmacbuf/driver/build converts driver.cc to src.cc for local library use

