Remove __UNCONST so clang won't bail if it can't find the #define
Append to PROGS; don't overwrite it
Merge branch 'remove-__UNCONST' into isilon-atf
Merge branch 'master' into isilon-atf
Use src.opts.mk instead of bsd.opts.mk to get MK_TESTS
Merge branch 'isilon-atf' into isilon-atf-fix-getenv-test