Bug 28822

This is a quote from the handbook:

    4.5.1.22. I really do not want to spend all day staring at the
    monitor. Any better ideas?  OK, do this before you go to bed/work/the
    local park:

	# cd /usr/ports
	# make -DBATCH install

    This will install every port that does not require user input. Then,
    when you come back, do:

	# cd /usr/ports
	# make -DIS_INTERACTIVE install

    to finish the job.

From what I read in bsd.port.mk IS_INTERACTIVE has to be used inside a
port's Makefile to mark it as interactive, but to tell make(1) to ignore
interactive ports one uses INTERACTIVE.

Fix: 

s/-DIS_INTERACTIVE/-DINTERACTIVE/