Throw error incorrection credentials
Throw error incorrection credentials

Have the XML-RPC layer throw an exception if authentication credentials
are not correct.

Fixes #456.

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