[pve-devel] Live storage migration V2

[Alexandre Derumier]

changelog:
 - add support for multiple local disks
 - complete the mirror jobs after the vm migration
 - rewrote qemu-mirror block jobs monitoring to handle multiple jobs in parralel
 - qm migrate <vmid> <targetnode> -online will try to use same disks storeid && format for remote local
   you can add -targetstorage  to choose alternative remote storage
 - stop nbd server at the end of the migration
 - lot of cleanups