Rebased to libvirt-4.2.0

rpm: fix incorrect expansion of macros with line continuations for args (rhbz#1558648)

Rebased to libvirt-4.1.0

qemu: Fix crash in offline migration (rhbz#1530130)
RHEL: qemu: Report full stats for completed migration (rhbz#1530130)

qemuDomainAttachDeviceMknodHelper: Remove symlink before creating it (rhbz#1532183)
cpu_x86: Copy CPU signature from ancestor (rhbz#1533418)
qemu: take current async job into account in qemuBlockNodeNamesDetect (rhbz#1530129)
qemu: migration: fix race on cancelling drive mirror (rhbz#1530129)
qemu: drop code for VIR_DOMAIN_JOB_BOUNDED and timeRemaining (rhbz#1530130)
qemu: introduce qemu domain job status (rhbz#1530130)
qemu: introduce QEMU_DOMAIN_JOB_STATUS_POSTCOPY (rhbz#1530130)
qemu: start all async job with job status active (rhbz#1530130)
qemu: introduce migrating job status (rhbz#1530130)
qemu: migration: don't expose incomplete job as complete (rhbz#1530130)
qemu: Fix type of a completed job (rhbz#1530130)

qemu: Properly store microcode version in QEMU caps cache (CVE-2017-5715)

util: add virFileReadHeaderQuiet wrapper around virFileReadHeaderFD (CVE-2017-5715)
util: introduce virHostCPUGetMicrocodeVersion (CVE-2017-5715)
cpu_x86: Rename virCPUx86MapInitialize (CVE-2017-5715)
conf: include x86 microcode version in virsh capabiltiies (CVE-2017-5715)
qemu: capabilities: force update if the microcode version does not match (CVE-2017-5715)
cpu: add CPU features and model for indirect branch prediction protection (CVE-2017-5715)

qemu: block commit: Don't overwrite error when rolling back disk labels (rhbz#1516717)
qemu: block commit: Determine relative path of images before initializing (rhbz#1516717)
qemu: domain: Don't call namespace setup for storage already accessed by vm (rhbz#1516717)

qemu: Publish virQEMUCapsCPUFilterFeatures (rhbz#1508549)
qemu: Separate CPU updating code from qemuProcessReconnect (rhbz#1508549)
conf: Introduce virCPUDefFindFeature (rhbz#1508549)
qemu: Filter CPU features when using host CPU (rhbz#1508549)
qemu: Fix CPU model broken by older libvirt (rhbz#1508549)

Add support for virtio-net.tx_queue_size (rhbz#1482514)

qemu: Fix qemuDomainGetBlockInfo allocation value setting (rhbz#1470127)
qemuDomainBuildNamespace: Handle special file mount points (rhbz#1471660)

qemu: Don't update CPU when checking ABI stability (rhbz#1470582)
cpu_x86: Properly disable unknown CPU features (rhbz#1470582)
qemu: Add qemuProcessFetchGuestCPU (rhbz#1470582)
qemu: Add qemuProcessVerifyCPU (rhbz#1470582)
qemu: Rename qemuProcessUpdateLiveGuestCPU (rhbz#1470582)
qemu: Add qemuProcessUpdateLiveGuestCPU (rhbz#1470582)
qemu: Export virQEMUCapsGuestIsNative (rhbz#1470582)
qemu: Move qemuProcessReconnect to the end of qemu_process.c (rhbz#1470582)
qemu: Update host-model CPUs on reconnect (rhbz#1470582)

qemu: Do not skip virCPUUpdateLive if priv->origCPU is set (rhbz#1441662)

qemu: Change coalesce settings on hotplug when they are different (rhbz#1414627)

util: storage: Make @backingFormat optional in virStorageFileGetMetadataInternal (rhbz#1461303)

util: storage: Output parsed network backing store string to debug log (rhbz#1461638)
util: storage: Add missing return to virStorageSourceParseBackingJSONGluster (rhbz#1461638)
util: storage: make virStorageSourceParseBackingJSONGlusterHost universal (rhbz#1461638)
util: storage: Add support for type 'inet' in virStorageSourceParseBackingJSONSocketAddress (rhbz#1461638)
util: storage: Split out parsing of TCP network host from JSON pseudoprotocol (rhbz#1461638)
util: storage: Report errors when source host data is missing (rhbz#1461638)
util: storage: Add JSON parser for new options in iSCSI protocol (rhbz#1461638)
util: storage: adapt to changes in JSON format for NBD (rhbz#1461638)
util: storage: adapt to changes in JSON format for ceph/rbd (rhbz#1461638)
util: storage: adapt to changes in JSON format for ssh (rhbz#1461638)
util: storage: adapt to changes in JSON format for sheepdog (rhbz#1461638)
qemu: Allow live-updates of coalesce settings (rhbz#1414627)
qemu: Pass the number of heads even with -vga qxl (rhbz#1283207)
util: storage: Export virStorageIsRelative (rhbz#1461303)
storage: Add helper to retrieve the backing store string of a storage volume (rhbz#1461303)
qemu: snapshot: Load data necessary for relative block commit to work (rhbz#1461303)