Pike 7.8/Roxen5 problem

[Martin Stjernholm, Roxen IS @ Pike developers forum]

Use #pike 7.4 or update your code to the newer Crypto api. The compat
wrappers for Crypto.AES as found in lib/7.4/modules/Crypto.pmod/aes.pike:

  string name() { return "AES"; }

  int query_key_length() { return 32; }
  int query_block_size() { return block_size(); }
  string crypt_block(string p) { return crypt(p); }