mkdirs.sh v5.0.0:
* Added service initialization (systemd or SysV) by default if running as root.
* Added '-no_systemd' option to not use systemd.
* Added '-no_init' option to skip any/all service inititalization.
* THe '-no_init' is implied with '-test' (and with undo '-R' option).
* Added SELinux handling for services installed with systemd.