[boost] [hash] Extract module from functional + std::hash_combine

Subject: [boost] [hash] Extract module from functional + std::hash_combine
From: Daniel James (dnljms_at_[hidden])
Date: 2017-12-19 13:31:16

Hi,

I'm planning to extract hash from functional into its own module, as
that will apparently break the circular dependencies that functional
is part of. Any objections? Also, any opinions on what the module
should be called? 'hash' might suggest a more general purpose hash
function, so maybe it should be called something more specific.

Daniel