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
Now that defining $DMD is no longer necessary to run DMD, this patch does the following. - Removes all the places where we set DMD=1 (test harnesses, etc.) - Still handles DMD=1, for backwards compatibility. - Prints "$DMD is undefined" at DMD start-up if appropriate. - Writes a |null| value for |dmdEnvVar| in the JSON if $DMD is undefined. Bumps the DMD output version number accordingly. - Changes a bunch of the test files accordingly, including changing the mode of script-ignore-alloc-fns.json in order to test a case where $DMD is undefined. --HG-- extra : rebase_source : eb1ef5722410734ce6d7658465ff6f442ee4ed49