#233 statistics function missing RP-ACKs

[dgholmberg]

A particular log-file has 434904 messages, but the
statistics tool only registers 359626. Lori did a test
on a shorter file and it seems that RP-ACKs were not
being counted:

"After I sent my email, I did a quick research using
one of my packet files. It looks like the ACK type
messages are not being logged at all. For example, I
had a ReadProperty and a ReadProperty-ACK message in
my logfile. The ReadProperty was counted but the
ReadProperty-ACK was not. This looks to be a problem
in the statistics code and how it figures out what
type of message it should be counted as."

However, my statistics shows plenty of ACKs, but much
fewer than expected. It may be that the
COVNotification ACKs are recognized, but not RP or RPM
ACKs (?)