voa: documentation clarifications
voa: abort loop on error (sender)
voa: call handle_packet correctly (decoder)
voa: require a contact name (sender), safer checks on -c
voa: documentation update
voa: create_voa_hs_packet need to encrypt before creating packet

otherwise size is unknown
voa: check_signature set vsize correctly
voa: verify_signature returns key to be used for decryption
voa: move debug print to until after packet filtering
voa: small code comment