setup: ask user to continue linking if one symlink couldn't be created

setup.sh

@@ -14,8 +14,16 @@ link()
 	local dst="$2"
 
 	if test -e "$dst" && ! test -L "$dst"; then
-		echo "No symlink $dst"
+		echo "File $dst exists and is no symlink.\nIgnore and continue? (y/N)"
+		read answer
+		case $answer in
+			[Yy]*)
+				return
+				;;
+			*)
 				exit 1
+				;;
+		esac
 	fi
 
 	if installed printf; then