Use exponent format for IPv6 statistics
Use exponent format for IPv6 statistics

Makes IPv6 statistics output a bit more compact, showing just how many
addresses are available becomes a next to incomprehensible long number.

Part of #248.

SpriteLink/NIPAP,garberg/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,bbaja42/NIPAP,garberg/NIPAP,garberg/NIPAP,plajjan/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,garberg/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,plajjan/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,plajjan/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,plajjan/NIPAP,garberg/NIPAP,SoundGoof/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,ettrig/NIPAP,plajjan/NIPAP,garberg/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,plajjan/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,SoundGoof/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP