Revision 420615

Minor improvements.

Most noticeable changes in no particular order:
- The rc.d script doesn't use the provided shell script to start the daemon,
  but starts it directly.
- This is now installed in ${DATADIR}, not in ${PREFIX}/${PORTDIRNAME}.
- Define CONFLICTS_INSTALL so as to avoid colliding with non standalone version.
- Use post-install-${OPTION}-on.

PR:		210608
Submitted by:	joshruehlig@gmail.com
Reviewed by:	crees
Approved by:	crees
Differential Revision:	https://reviews.freebsd.org/D7304