K 10 svn:author V 3 imp K 8 svn:date V 27 2014-04-18T17:04:18.071412Z K 7 svn:log V 373 Allow setting of MK_FOO by anybody. There are too many edge cases that we're preventing now with this policy. However, these edge cases should be rare and all that set MK_FOO directly. WITH_FOO and WITHOUT_FOO both being defined now result in the non-default behavior happening silently. Users needing determinism here fall into the edge case exception for MK_FOO setting. END