9696 add /etc/system.d support
Portions contributed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Hans Rosenfeld <hans.rosenfeld@joyent.com>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>
Reviewed by: C Fraire <cfraire@me.com>
Reviewed by: Toomas Soome <tsoome@me.com>

*** 24,34 ****
  # Copyright (c) 2012 by Delphix. All rights reserved.
  # Copyright (c) 2012, Igor Kozhukhov <ikozhukhov@gmail.com>
  # Copyright 2012 OmniTI Computer Consulting, Inc.  All rights reserved.
  # Copyright 2014 Garrett D'Amore <garrett@damore.org>
  # Copyright 2016 Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
! # Copyright 2016 Nexenta Systems, Inc.
  # Copyright 2017 RackTop Systems.
  # Copyright 2019 OmniOS Community Edition (OmniOSce) Association.
  #
  
  #
--- 24,34 ----
  # Copyright (c) 2012 by Delphix. All rights reserved.
  # Copyright (c) 2012, Igor Kozhukhov <ikozhukhov@gmail.com>
  # Copyright 2012 OmniTI Computer Consulting, Inc.  All rights reserved.
  # Copyright 2014 Garrett D'Amore <garrett@damore.org>
  # Copyright 2016 Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
! # Copyright 2017 Nexenta Systems, Inc.
  # Copyright 2017 RackTop Systems.
  # Copyright 2019 OmniOS Community Edition (OmniOSce) Association.
  #
  
  #
*** 176,185 ****
--- 176,186 ----
          /etc/skel       \
          /etc/svc \
          /etc/svc/profile \
          /etc/svc/profile/site \
          /etc/svc/volatile \
+         /etc/system.d \
          /etc/tm  \
          /etc/usb   \
          /etc/user_attr.d \
          /etc/zfs  \
          /etc/zones  \