Use tar-ignore instead of extend-diff-ignore to exclude gbp.conf.
Use tar-ignore instead of extend-diff-ignore to exclude gbp.conf.

nrich/libsdl1.2-vnc,nrich/libsdl1.2-vnc,nrich/libsdl1.2-vnc,nrich/libsdl1.2-vnc,nrich/libsdl1.2-vnc