Revision 443914

sysutils/apcupsd: Several improvements

Add support for running multiple instances of apcupsd[1]
Add an option to use `shutdown -p` rather than `shutdown -h`[2]
Set as @sample several scripts that can be customized[3]
Add an option for build with MODBUS USB driver support (Enabled by default)[4]
Set LICENSE_FILE [5]
Sort OPTIONS and make a small adjustment in pkg-message
Take maintainer'ship

PR:		180336 [1]
PR:		187924 [2][3]
PR:		215809 [4]
PR:		220002 [5]

Submitted by:	leres@ee.lbl.gov [1]
Submitted by:	tdb [3]
Submitted by:	ipluta@wp.pl [4]
Submitted by:	takefu@airport.fm [5]

Approved by:	garga (mentor)
Differential Revision:	https://reviews.freebsd.org/D11224