[boost] Encoding address-model in library names

I have prepared the pull requests necessary to encode the address-model (32 or 64) in the library names, which allows placing the 32/64 libraries into the same stage/install directory, and building with address-model=32,64 in one go. These are https://github.com/boostorg/boost/pull/147 and https://github.com/boostorg/config/pull/159 This being a Serious Change, the prudent thing to do is to wait out 1.65, then proceed. On the other hand, experience shows that this kind of change is only tested when a release goes out anyway; delaying it for four more months would not help much. Therefore, I'm calling for opinions; would people want this to go into 1.65? Into 1.66? Not at all?