Need to limit the event log to a reasonable size.

[stopthatcow]

When the event log is large IKE slows down considerably

Also should switch to the caching middleware as IO from disk seem to take a long time.

A simple get takes ~17 seconds with a event log of 1 days worth of data! (~3770 entries)

[stopthatcow]

Using caching middleware, now limit to 1000 entries of each event type with rollover