new repo-wide config option for a Binary Transparency Log

new repo-wide config option for a Binary Transparency Log

A Binary Transparency Log is a append only log of all binaries published by
a repo.  This is useful for people to find whether the binary they have
matches what F-Droid has published, and also makes it more difficult for
the published history to be changed without notice, or for a server to give
specific users custom malware binaries.

https://www.eff.org/deeplinks/2014/02/open-letter-to-tech-companies