A smarter form of 559cea7fa9.
Travis users can't force Travis to update 10.11 to Xcode 8, so this was murdering
builds left, right & centre.
Fixes https://github.com/Homebrew/brew/issues/1096 whilst still retaining the
point of the original commit. Also offers developers an opt-out so if we need
to test something on 10.11 with Xcode 7.x we can, etc.
This reverts commit a124680b189f50ebeb550845e3c0efd34db66247.
Will need to be smarter than this, since people can't force Travis to
update. I'm losing count of the amount of times Travis has forced a change
of plans around Homebrew this year.
Closes https://github.com/Homebrew/brew/issues/1096.
Not quite a mass replacement as I've used OS X and Mac OS X where
describing specific older versions and added compatibility methods
for things in the DSL.
Substitue each Version.new and HeadVersion.new with Version.create
to unify Version and HeadVersion instantiation among core code.
Note that this does not relate to Mac::OS::Version class.
Beta versions of XQuartz have address sanitization enabled, which
breaks some software at runtime, including wine.
Closes Homebrew/homebrew-core#2481.
Closes#459.
Signed-off-by: Misty De Meo <mistydemeo@github.com>
