* fix: Check HC counters individually
Vendors are very inconsistent returning ifXTable values.
Some only implement some of them (seemingly randomly).
Others return them, but they are always 0.
This attempts to fix that by checking each value individually.
* A couple of small cleanups
* Change the logic, The (if < hc) logic will be messed up when the counters roll.
Just make sure it is not 0 or an empty string.
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