[Nut-upsuser] new variable

[Kiss Gabor (Bitman)]

Dear Arnaud,

Now I started to write a driver that simulates continous power breaks.
(E.g. in every 30 minutes.)
This could be used for testing of setup of client upsmons.

I have to simulate a behaviour of a real UPS. The physical model
contains an extra attribute: the charging current that needed to compute
recharge time and actual battery charge during the recharge process.

Can we call this variable "battery.current.recharge"?
Or should I put it into "driver.*" name space?

Cheers

Gabor