[dmd-internals] regression fixes

[Brad Roberts]

To everyone who's worked on and submitted pull requests and/or patches for regression bugs, a big thank you!

http://d.puremagic.com/issues/buglist.cgi?query_format=advanced&field0-0-0=keywords&bug_severity=regression&bug_severity=blocker&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&type0-0-0=anywords&value0-0-0=patch&component=coffimplib&component=DMD&component=druntime&component=dstress&component=htod&component=installer&component=make&component=Optlink&component=Phobos&component=websites&product=D

That's 17 regression and blocker bugs flagged with the patch keyword.  There's a total of 68 reg+blo bugs open, so
that's 25% of them.  Assuming they all make it into the next release, that's a huge improvement.

Thanks for the fixes!

Later,
Brad