Fake Closure Comparison

Morning internals, While discussing some of the details of the first class callable RFC, it became apparent that fake closures (created by Closure::fromCallable) are not currently comparable in a useful way. Although this is not directly related to the first class callable feature, it's likely that the proliferation of this kind of code will follow, so now seems like a good time to fix the problem. https://github.com/php/php-src/pull/7223 Any objections to merging that in master ? Cheers Joe