Dear Maintainer,

using amcrypt-ossl-asym results in extra output about deprected "openssl
enc" options and does not encrypt: no backup is written!

root@marta:/# date | sudo -su backup amcrypt-ossl-asym >/dev/null
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.

For testing purpose I added (as recommended) the option -pbkdf2 to the encoding and the decoding
lines and now it works.

Please fix and report upstream.

Thank you.