tripplite_usb unitid default value documented incorrectly

[rewsssiestedbo]

The default tripplite_usb driver value for unitid is set to -1 (as a long value), but the documentation references the default as being 65535 (16-bit -1). In reality, default ends up being 4294967295 (32-bit -1).

The source should be changed to assign "unit_id" the value of "DEFAULT_UPSID" instead of "-1". (line 318)

[jimklimov]

Curious catch, thanks. Would you please post a PR to illustrate?

[rewsssiestedbo]

PR posted. It took me a while to understand why nut no longer recognized my UPS after upgrading from 2.8.0 to 2.8.1. Finally realized that the comment of the default value for unit_id being 65535 didn't make sense for -1 as a 32-bit value, and that someone had defined the DEFAULT_UPSID but didn't use it for the default value of unit_id.