resolves: rhbz#2059285
Disable 5-level page tables when using -cpu max
resolves: rhbz#2084568
SELinux relabelling should not stop on ext4 immutable bits
resolves: rhbz#1794518
Ignore "iface" in add-drive variants
resolves: rhbz#1844341
Lift protocol limit on guestfs_readdir()
resolves: rhbz#1674392
Richard W.M. Jones