Add redirect style save which works on newer (not 3550's) devices 

like 2960, 3750, etc

I use this in combination with 
```shell
kron occurrence SaveConfigSchedule at 23:00 Sun recurring
 policy-list SaveConfig
!
kron occurrence Backup at 23:10 Sun recurring
 policy-list Backup
!
kron policy-list SaveConfig
 cli write
!
kron policy-list Backup
 cli save
```
To automatically backup my core devices every sunday