- create/remove unit files in normal generator directory

- create/remove unit files in normal generator directory
- prefix service and socket units with "rc-inetd-"
- ensure that exit status of the per-connection processes is forgotten, to
  make sure that systemd won't keep around information for numerous possibly
  failed connections
- nowait means "Accept=true" (http://0pointer.de/blog/projects/inetd.html)
- properly set stdin and stderr

Changed files:
    pld-rc-inetd-generator.sh -> 1.4