fix #8470: drag nodes along segments in Extrude mode only when Ctrl pressed
use extrude.drag-nodes-without-ctrl=true if you prefer dragging without Ctrl

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6050 0c6e7542-c601-0410-84e7-c038aed88b3b
Merge branch 'master' into mirror