[Release-testers] [7.0.0 Release] rc1 has been tagged

[Hans Wennborg via Release-testers]

Dear testers,

7.0.0-rc1 was just tagged (from the branch at r338847).

It's early in the release process, but I'd like to find out what the
status is of the branch on our various platforms.

Please run the test script, share the results, and upload binaries.

Thanks,
Hans