Check HP switch sensor status via Nagios

It works as advertised, but there's no help option, so you can't request the usage with "-h".
Also, when run from the commandline, it omits a newline, so it messes up the terminal window, but perhaps when called from nagios, this isn't a problem.
Also, perl complained about:
Use of uninitialized value within @sensor_desc in pattern match (m//) at check_hpswsensor line 54.
Use of uninitialized value $lsensor in concatenation (.) or string at check_hpswsensor line 56.

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