Document udev rules

[andrewdavidmackenzie]

Fixes #784

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28%. Comparing base (d6743ff) to head (a4e6abe).
Report is 5 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #796   +/-   ##
=====================================
  Coverage      28%    28%           
=====================================
  Files          46     46           
  Lines        5991   5991           
=====================================
  Hits         1631   1631           
  Misses       4360   4360           

Flag	Coverage Δ
unittests	28% <ø> (ø)

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