[RPKI] Routinator 0.9.0-rc3 released

[Martin Hoffmann]

Hi!

We decided to publish another release candidate for Routinator 0.9.0,
RC3.

This candidate introduces RPM packages for Centos 7 and Centos 8 which
are available through the NLnet Labs packages repository. You can find
instructions for setting up this repository on your system and
installing Routinator here:

   https://routinator.docs.nlnetlabs.nl/en/0.9.0rc3/installation.html

There are also instructions on how to install the release candidate
through other means such as Debian packages or by building with Cargo.

In addition, we decided to increase the minimal supported Rust version
to 1.47. Since publishing the first release candidate, this minimal
version has become possible in Alpine Linux which we are using for
Docker and increasing the version allows us to remove a pin on one of
the dependencies.

The complete release notes for this RC can be found at:

   https://github.com/NLnetLabs/routinator/releases/tag/v0.9.0-rc3

On behalf of the NLnet Labs RPKI Team,
Martin