Nut upsdev - Feb 2006 - upsimage/upsstats: 3phase support

The attached patch is a first stab at adding 3phase support to 
upsstats/upsimage. I got a little carried away, so bare with me.

This patch adds 3phase awareness to upsstats/upsimage and the template 
files, and in additional to the obvious 3phase variables:
- upsstats:
* Adds IF/ELSE-awareness, and since the parser logic is rather limited
   this means that we now have IF, ELSE IF etc since all statements are
   and:ed. Examples in upsstats.html.
* Adds IFEQ (IF Equal)
* Adds IFBETWEEN (if a value is within bounds)
* Removes UTILITYCOLOR, since it's now possible to "script" that.
* Adds possibility to give a full path to upsstats/upsimage. This
   comes in handy when you call the CGI stuff by SSI from a parsed HTML
   page and want links to go to that HTML page and not the CGI:s
   directly. And possibly other uses.
- upsimage:
* Fixes the battery.voltage graph. It was hardcoded to 40V or
   something, looked outright ridiculous with 420V battery voltage ;)
* Improves logic on figuring out min/max values to cope with 400V
   nominal.

And probably more stuff that I have fixed while stumbling around in 
the code.

To fix before commiting:
* There are a couple of FIXME:s that I stumbled upon that really
   should be taken care of.
* Update man-pages.


/Nikke
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  Niklas Edmundsson, Admin @ {acc,hpc2n}.umu.se      |     nikke@acc.umu.se
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On Mon, 6 Feb 2006, Niklas Edmundsson wrote:
> The attached patch is a first stab at adding 3phase support to 
> upsstats/upsimage. I got a little carried away, so bare with me.
Kjell and others found some exciting bugs, so here's try 2 which adds 
the following in addition to the previous feature-list:

* Be smarter about guessing nominal battery voltage in order to
   provide sane graph while discharging, also fixes the off-by-one-bug
   that caused a ups with 12V battery voltage to get 0V nominal ;)
* Don't assume people are running their webbrowser in 1600x1200,
   tidied up the tables to make it look better.
* Fixed the broken @RUNTIME@ which was buggy and had inconsistent
   output, it now always prints hh:mm:ss.

/Nikke
-- 
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  Niklas Edmundsson, Admin @ {acc,hpc2n}.umu.se      |     nikke@acc.umu.se
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