Add passcode to phone to dump all of the keychain

[Alex1s]

On my iPhone 4s 9.3.6 I was not able to dump the entire keychain because it had no passcode set. I got the warning that I should unlock the screen of my phone although it was already unlocked.

Once I set a passcode (can just be "0000") and then run keychain-dumper, the programm blocks and I get asked for the passcode of my phone. Once I entered it keychain-dumper starts to dump the entire keychain.

I think this may be useful for some other people as well, so can you can add a hint at the readme like: "Make sure you have your screen unlocked AND a passcode set to be able to dump all of the keychain".

Thanks!