[Nut-upsuser] 2.6 and 2.2

[Mike.]

I want to upgrade to 2.6 now that it is an official release.  


I have one box that is connected to the UPS via the serial port
('master').  I have another box that connects to the master over the
network.

Can I upgrade the master to 2.6, leaving the other box at 2.2, or do I
need to upgrade everything to 2.6 at the same time?  

Eventually I want to bring everything up to 2.6, but I want to do it a
step at a time.

Thanks.