usage: /current.cgi
query-string-parameters: ?name1=value2&name2=value2...

day: day in [[yyyy/]mm/]dd or dd[[.mm[yyy]]
default: today
e.g.:
    /current.cgi?day=7
    /current.cgi?day=7.2
    /current.cgi?day=7.2.23

days: number of days. From day to day + days. If days is negative from day - days to day.
default: 1
e.g.:
    /current.cgi?day=7.2&days=3
    /current.cgi?days=-3

every: show data every seconds. Append m for minutes h for hours.
default: 1h
    /current.cgi?every=0 # show all values limited by 100 lines
    /current.cgi?every=1h30m
    /current.cgi?every=90m
    /current.cgi?every=h

from: format hh[:mm[:ss]]
default: first data point

to: format hh[:mm[:ss]]
default: last data point
If to is specified only the first day is displayed.
    /current.cgi?day=2023-02-09&from=10:00&to=10:05&every=0
    /current.cgi?day=2023-02-09&from=10:00&to=11:00&every=10

n: max number of lines displayed
default: 1000
n=0 means no limit.

reset: if value not 0 the integrated energy per Volt Wh/V == Ah is reset at the begin of each day.
default: 1
    /current.cgi?days=-1&n=0&reset=0
    /current.cgi?days=-1&n=0&reset=1

combined examples:
    /current.cgi?days=-4&every=4h&n=0
    /current.cgi?day=10.2&days=-4&every=4h&n=0