[hobbit] hobbitgraph.cfg definition for graphing total # httpd servers

[Tom Georgoulias]

Arnoud Post wrote:
> There are a few errors in your rrd definitions (some misplaced "IW" and 
> "TW"), this setup will work to get the totals into the same graph.

Thanks.  The patch I attached was a modified version of the one I'm 
actually using in production, so the typos were introduced by accident. 
(the variables & titles I use are more descrptive than those in the 
default hobbit file, to make it easier for other depts. to understand 
all of the data in Hobbit).

Tom