chore, PEBKAC, logger() doesn't take extra \n at the end of the format string

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, turn most QUO_DEBUG() statements into logger() calls

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'code/hygiene' into next

* code/hygiene:
  minor, turn most QUO_DEBUG() statements into logger() calls
  chore, PEBKAC, logger() doesn't take extra \n at the end of the format string