[libvirt] [PATCH] Add AM_MAINTAINER_MODE

Hi, attached patchs adds AM_MAINTAINER_MODE and keeps it enabled by defaults. This allows downstreams to turn it of via: ./configure --disable-maintainer-mode as discussed in https://www.redhat.com/archives/virt-tools-list/2010-October/msg00049.html O.k. to apply? Cheers, -- Guido