Add check for duplicate MACs in instance add
[ganeti-local] / scripts /
drwxr-xr-x   ..
-rwxr-xr-x 10304 gnt-backup
-rwxr-xr-x 24969 gnt-cluster
-rwxr-xr-x 7967 gnt-debug
-rwxr-xr-x 56362 gnt-instance
-rwxr-xr-x 10985 gnt-job
-rwxr-xr-x 18630 gnt-node
-rwxr-xr-x 4006 gnt-os