Committed, thanks.

Of course, I spend all last week working on it and have patches 
against what I originally submitted, and I'm ready to submit and you 
go ahead and commit it :)



I did a lot of work on what I originally had and actually fixed some 
numbers.  It seems my math was way off when I originally calculated 
some intervals!  If you're testing this, you'll need to re-create your 
graphs if you used the default values as I think I had something crazy 
like keep 1 day average for 31 days (for a monthly view) which makes 
no sense.



Another major thing is that I broke up the 'calc' option into 
'text_calc' and 'graph_calc' as I was seeing that there were a lot of 
times where someone would want to manipulate the graph, but keep the 
text the same, or vice versa.



The last "upgrade" is a history view link.  The graph in the subsystem 
status is now a link that pulls up a default history of 12 hours, 24 
hours, 1 week, 1 month, and 1 year.  Perhaps in the future this would 
be nice to customize, but for now it works great.



In the near future, I'm going to add more options to the graph itself, 
such as labels, etc. but who knows when that will be.  As it stands, 
this works great and I really want to add it to the other devices, 
such as Apache, etc. as the graphing options are so dynamic.



-Mike