Increase the default number of data items in the RRD database
from 144 to 288. This leads to smaller summarising/averaging periods,
visible especially in the day & week graphs. The averaging intervals
will be: 30s, 5min, 35min, 2h35min, 1d6h30min
(Note: this change only applies in a live router if the RRD database is
empty. E.g after reboot or after emptying the RRD database dir.)
Reference to discussion at #4065
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
(cherry picked from commit c21c6668edfc5154070660afa80153caad6565f7)
d63d9c54f5