[Nut-upsdev] Merging blzr as blazer (and un-merging voltronic?)

[hyouko at gmail.com]

It's ok with me.

There are just a couple of differences (already signaled in the
manual) against the blazer drivers:
- 'test.battery.start' instant command
- 'ondelay' ups.conf option
now they both expect seconds while before they wanted a value
expressed in minutes.

Plus, the order in which the protocols are tested on startup if no one
has been chosen is different:
- now it is: voltronic, mustek, megatec-old, megatec, mecer and zinto
- before it was: megatec, mustek, megatec-old and zinto
but I think this shouldn't cause any problem.

Against the voltronic drivers the differences (already signaled in the
manual) are:
- ups.conf options changed:
 * 'ondelay': it wanted minutes, now it expects seconds, plus now it
defaults to 3 minutes while before it had a default value of 0
 * 'battnumb' renamed to 'battery_number'
- ups.conf options moved to settable vars and therefore no longer supported:
 * 'battpacks' -> battery.packs
 * 'battlow' -> battery.voltage.low
 * 'auto_reboot' -> ups.start.auto
 * 'battery_protection' -> battery.protection
 * 'energy_saving' -> battery.energysave
 * 'cold_start' -> ups.start.battery
 * 'outlet_control' -> outlet.0.switchable
 * 'max_eco_volt' -> input.transfer.high
 * 'min_eco_volt' -> input.transfer.low
 * 'max_eco_freq' -> input.frequency.high
 * 'min_eco_freq' -> input.frequency.low
 * 'outlet{1,2,3,4}_delay' -> outlet.{1,2,3,4}.delay.shutdown
 * 'batt_type' -> battery.type