Re: [libvirt] [PATCH 2/2] Add support for QEMU -add-fd support detection

> > ...this code is what checks for 1.3. In 1.2, the qemuMonitorAddFd() > call fails with an error, so we clear the bit back out. Only 1.3 allows > libvirt to specify its own set number, because that was one of the > changes qemu had to make in order to add the -add-fd command-line option. > This approach looks fine for verifying the availability of 1.3 support (assuming no fd sets were introduced prior to this point).