[release] 1.71.0 deadline for new libraries approaching

From: Michael Caisse (mcaisse-lists_at_[hidden])
Date: 2019-06-19 21:47:21

One week from today master will closed for new libraries and breaking
changes.

Thanks,

-- The Boost Release Team

Boost Calendar with the release schedule:
<http://www.boost.org/development/index.html>