Function nginx::i2d_PKCS8PrivateKey_nid_fp

pub unsafe extern "C" fn i2d_PKCS8PrivateKey_nid_fp(
    fp: *mut FILE, 
    x: *mut EVP_PKEY, 
    nid: c_int, 
    kstr: *mut c_char, 
    klen: c_int, 
    cb: pem_password_cb, 
    u: *mut c_void
) -> c_int