CA-65181: include the domid in the qemu syslog key
CA-65181: include the domid in the qemu syslog key

Forkhelpers.safe_close_and_exec now supports the means of specifying a particular key to use when using the fe daemon to forward stdout to the syslog. Use this to include the domid of the spawned qemu-dm process in the logging key.

Signed-off-by: Jonathan Davies <d3af50858a27f644d377a39d1fbd399608163688@citrix.com>

koushikcgit/xcp-networkd,robhoes/squeezed,sharady/xcp-networkd,djs55/xcp-networkd,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-networkd,djs55/xcp-networkd,koushikcgit/xcp-rrdd,koushikcgit/xcp-rrdd,johnelse/xcp-rrdd,djs55/squeezed,sharady/xcp-networkd,simonjbeaumont/xcp-rrdd,djs55/xcp-rrdd,koushikcgit/xcp-rrdd,djs55/xcp-rrdd,johnelse/xcp-rrdd