ports broken in current

I have just updated my 11-CURRENT tinderbox machine and found an issue
that breaks ports building.

make: "/usr/share/mk/bsd.port.mk" line 15: Could not find bsd.own.mk

This is highlighted as tinderbox creates a clean build environment while
the base system kept working with the old file being left behind - make
delete-old doesn't remove bsd.own.mk from base but a clean system
doesn't get it installed.

In r265420 /head/share/mk/Makefile removed reference to bsd.own.mk and
replaced it with src.opts.mk

bsd.port.mk was left unaltered still including bsd.own.mk which now
doesn't get installed but is still in svn, breaking ports building.

Should bsd.port.mk include src.opts.mk instead of bsd.own.mk or should
bsd.own.mk be re-added to the install list?

This appears to carry on from the yesterdays build fails with
src.opts.mk not being found.

Shane