RT 1638; EVP_*Final() should mention they no longer cleanup the ctx.

EVP_CipherInit_ex() except the B<ctx> parameter does not need to be

initialized and they always use the default cipher implementation.

EVP_EncryptFinal(), EVP_DecryptFinal() and EVP_CipherFinal() behave in a

similar way to EVP_EncryptFinal_ex(), EVP_DecryptFinal_ex() and

EVP_CipherFinal_ex() except B<ctx> is automatically cleaned up 

after the call.

EVP_EncryptFinal(), EVP_DecryptFinal() and EVP_CipherFinal() are

identical to EVP_EncryptFinal_ex(), EVP_DecryptFinal_ex() and

EVP_CipherFinal_ex(). In previous releases they also cleaned up

the B<ctx>, but this is no longer done and EVP_CIPHER_CTX_clean()

must be called to free any context resources.

EVP_get_cipherbyname(), EVP_get_cipherbynid() and EVP_get_cipherbyobj()

return an EVP_CIPHER structure when passed a cipher name, a NID or an