block expire time

The actions taken when the block expire time equal zero has changed.

When the block is parsed, the parsed data is compared to the cached 
data, and if different, then copied.

Then if the expire time is greater than zero, the data is written 
to the db.  This routine is only called 

I think this is more what everyone thinks should happen.  If no 
cache time is given, don't use a cache.

Joe


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