ref: 055f8370432d2c128ce8fd28b059320181d8f3ef
parent: 75c6ab45e02640959260fa98449180e9408141bc
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Sat Oct 22 20:31:42 EDT 2016
ip: simplify code as packblock() and concatblock() will never error