Function nginx::EVP_CIPHER_meth_set_do_cipher

pub unsafe extern "C" fn EVP_CIPHER_meth_set_do_cipher(
    cipher: *mut EVP_CIPHER, 
    do_cipher: Option<unsafe extern "C" fn(ctx: *mut EVP_CIPHER_CTX, out: *mut c_uchar, in_: *const c_uchar, inl: size_t) -> c_int>
) -> c_int