Re: [libvirt PATCH v2] run: add ability to set selinux context

When running libvirt from the build directory with the 'run' script, it will run as unconfined_t. This can result in unexpected behavior when selinux is enforcing due to the fact that the selinux policies are written assuming that libvirt is running with the system_u:system_r:virtd_t context. This patch adds a new --selinux option to the run script. When this option is specified, it will launch the specified binary using the 'runcon' utility to set its selinux context to the one mentioned above. Since this may require root privileges, setting the selinux context is not the default behavior and must be enabled with the command line switch. Note that this uses argparse to parse the new option, but it does so in a very limited way in order to avoid interfering with any arguments that the user might want to pass on to libvirt. For example, we do not provide a `--help` option for the run script. Signed-off-by: Jonathon Jongsma <jjongsma(a)redhat.com&gt;