K 10
svn:author
V 6
brooks
K 8
svn:date
V 27
2020-03-23T17:50:00.258990Z
K 7
svn:log
V 279
MFC r359046:

Support SUBDIR.${MK_FOO}.${MK_BAR} expresssions.

This allows simplification of Makefiles where some SUBDIR entries depend
on two things (e.g. something that depends on C++ and some other knob).

Discussed with:	imp, jhb
Obtained from:	CheriBSD
Sponsored by:	DARPA

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