[mkgmap-dev] Commit r4376: code cleanup using hints from sonarlint, no change in output expected

Version mkgmap-r4376 was committed by gerd on Mon, 25 Nov 2019 code cleanup using hints from sonarlint, no change in output expected - improve check of --polygon-size-limits, stop if an error is found instead of writing errors to stderr - use log.error() instead of system.err.println() - use more lambdas and computeIfAbsent - merge nested if-then clauses - improve formatting - remove some TODO http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4376