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All variables that depends on where SDI is running are now customizable
and can be read from a wwwsdi.conf file.
Also, all hardcoded 'NRE' were changed to 'TYPE' which will be confortable
to migrate SDI to any other place that is not PrD.
Such variables are customizable:
TYPEDIR  #Directory that contains all types of hosts
TYPENAME #You can give a name to what each type means, like NRE at PrD
WWWDIR   #Directory where all index to types are created
DATADIR  #Directory containing SDI data colected from hosts
Signed-off-by: Bruno Ribas <ribas@c3sl.ufpr.br>