Changing Kernel Options, Volumio requirements

Basics

support for initramfs
overlayfs
squashfs
nls437 nfs server

Volumio 2 reqs

usb audio board's soc sound options and codes iptables
all built-in wireless options (wifi/bluetooth) and possible wifi dongles

Wherever possible, configure the options as a module (no need to blow up the kernel for things we not always use)