Allow easy opt-out of using start-stop-daemon

Allow users to easily opt-opt of using the start-stop-daemon in the
launch script. This may be required on distros that include older
versions.

Fixes gh-4732

spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script

@@ -143,7 +143,7 @@ do_start() {
     chown "$run_user" "$PID_FOLDER"
     chown "$run_user" "$pid_file"
     chown "$run_user" "$log_file"
-    if which start-stop-daemon >/dev/null; then
+    if [ {{useStartStopDaemon:true}} = true ] && which start-stop-daemon >/dev/null; then
       start-stop-daemon --start --quiet \
         --chuid $run_user \
         --name $identity \