[boost] [release] 1.68.0 closed for Beta

Subject: [boost] [release] 1.68.0 closed for Beta
From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2018-07-05 14:32:37

The master branch is now closed for all changes except by permission
for the Beta release.

Also, remember to add your libraries' changes to the release notes at:

<
https://github.com/boostorg/website/blob/master/feed/history/boost_1_68_0.qbk
>

Thanks,

-- The Boost Release Team