[boost] [Config] Support for switching between std:: and boost:: equivalents.

Subject: [boost] [Config] Support for switching between std:: and boost:: equivalents.
From: John Maddock (jz.maddock_at_[hidden])
Date: 2015-06-05 03:41:25

There is a pull-request for Config to provide support for switching 
between boost:: and std:: library equivalents: 
https://github.com/boostorg/config/pull/63

My questions are:

* Is this the right approach?  And,
* Is Boost.Config the right place for it?

Thanks for your comments, John.