Expose Camellia, CAST5 and IDEA ciphers

All of them are used in the OpenPGP specification for symmetric ciphers
[0].

IDEA and CAST5 may be old but they are provided for users for decryption
of archive data. Camellia is used in the new version of the OpenPGP
specification as an alternative to AES.

[0]: https://openpgp-wg.gitlab.io/rfc4880bis/#name-symmetric-key-algorithms