[mkgmap-dev] Commit r4293: remove "Hide unaccessible tunnels" rule which is too simple and thus may remove wanted highways.

Version mkgmap-r4293 was committed by gerd on Fri, 27 Sep 2019 remove "Hide unaccessible tunnels" rule which is too simple and thus may remove wanted highways. http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4293