I use the appender like
the pattern I specify includes file counter in each day. In may case it may easily turn out I have hundreds of files per day.
The problem is that %i syntax does not allow me to have leading zeroes in the names I generates. This ends up it's a but tricky to look through files list I have on my disk, which are sorted in sexicographical order.
Having an ability to force adding leading zeroes to the pattern will solve the issue.