[Feature: Both Versions] Reset statistics

[Lednerb]

After the installation, I've got many errors because there was another tool that tried to connect with wrong credentials.

However, it would be a nice feature to reset the 30-day statistics.

[SH]

Well, you can delete these lines from /var/log/qpsmtpd/*-total. These chart is simple "sum" of these lines so there wont be any reset function until it is generated directly from logs...