The script nwsip.pl has been modularized: in particular, the timing
functions and the management of the configuration file are in two internal
modules. Extracting those modules and make them reusable is straighforward.
Presently the nwsip.pl script is instrumented in order to compute the
timing of the queries, and this makes the script slightly inefficient.

To call a periodic execution, just modify the variables in the script
"periodic.sh": it shouldn't be necessary to modify anything else. Then
invoke as:

$ ./periodic.sh <n>

where <n> is the number of times you want the nwsip.pl script be executed.
The period is a variable in the "periodic.sh" script.

The following files are generated:
nwssystem.log - all registrations kept by the nameserver (sensors, memories,
                forecasters etc);
nwstiming.log - the timing of each query to NWS;
stats.txt     - the cumulative statistics of the data in nwstiming.log;
                queries are grouped by kind, and the max, min and average 
		time are computed;
lasttry.log   - the last LDIF file built by nwsip.pl