[BRLTTY] Reminder: -U is useful for low-power (laptop) usage

[Mario Lang]

Hi.

While recently playing with powertop I noticed that once I kill most of
the obvious power hungry stuff brltty shows up as one of the top reasons
for wakeup.  On a desktop, thats really no problem, but on a laptop you
might like to consider tradeoffs to get more runtime on battery.
As a reminder to those interested in this topic, the
parameter to tweak here is -U, the update-interval.
It defaults to 4, but depending on your usage
habits, you might be able to raise it to 6 or even up to 10.

-- 
CYa,
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