[release] Boost 1.77.0 Release Candidate 1

From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2021-08-05 13:40:21

The first release candidates for the 1.77.0 release are now available at:
<https://boostorg.jfrog.io/artifactory/main/release/1.77.0/source/>

The SHA256 checksums are as follows:

fc9f85fc030e233142908241af7a846e60630aa7388de9a5fafb1f3a26840854  boost_1_77_0_rc1.tar.bz2
f2dd9722b21450daf5ce8ef82c2d99c7ec304f913ee6c6b7f047d5639503dda1  boost_1_77_0_rc1.7z
5347464af5b14ac54bb945dc68f1dd7c56f0dad7262816b956138fc53bcc0131  boost_1_77_0_rc1.tar.gz
d2886ceff60c35fc6dc9120e8faa960c1e9535f2d7ce447469eae9836110ea77  boost_1_77_0_rc1.zip

As always, the release managers would appreciate it if you download the
candidate of your choice and give building it a try. Please report both
success and failure, and anything else that is noteworthy.

-- The Release managers