[mkgmap-dev] Commit r4693: apply linkPOI.patch (improve --link-pois-to-ways option and reporting)

Version mkgmap-r4693 was committed by gerd on Tue, 04 May 2021 apply linkPOI.patch (improve --link-pois-to-ways option and reporting) - introduce extra HashMap to improve the code which identifies the CoordNode that is related to the CoordPOI so that it doesn't have to guess using the position of points, removes the "found multiple points with equal coord as CoordPOI at ..." messages - add the string "link-pois-to-ways:" to messages which are related to that option - implement and use copy constructor for CoordPOI http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4693