https://bugzilla.redhat.com/show_bug.cgi?id=1328968
--- Comment #4 from Neal Gompa ngompa13@gmail.com --- @Andy:
I chose to name it capnproto for consistency with other distros that have it packaged, namely Debian[0] and Ubuntu[1], and the upstream project itself is named as such, even though the tarball is still capnproto-c++.
The README.txt file is in the tarball, but it merely provides instructions on how to build it from source, which is generally not useful for a pre-built package, so I elected to not include it.
[0]: https://packages.debian.org/sid/capnproto [1]: http://packages.ubuntu.com/xenial/capnproto