OpenBGPD 9.0 released

We have released OpenBGPD 9.0, which will be arriving in the
OpenBGPD directory of your local OpenBSD mirror soon.

This release includes the following changes to the previous release:

* Rewrite the Adj-RIB-Out handling to be more memory efficent
and faster. For large IXP route server deployments a reduction
in memory usage of more than 50% should be feasible.

* Process UPDATE messages in two phases: first update Adj-RIB-In,
Loc-RIB, and FIB, then process all the Adj-RIB-Out tables.
This significantly reduces the latency since updating all the
Adj-RIB-Out tables could take a fair amount of time.

* Introduce CH hash tables - a scalable hash map implementation
that boosts performance through improved cache locality.

* Introduce new metrics that track the amount of time spent in
various parts of the main event loop of the route decision engine.

* Fix various non-criticial things uncovered by Coverity scanner.

OpenBGPD-portable is known to compile and run on FreeBSD and the
Linux distributions Alpine, Debian, Fedora, RHEL/CentOS and Ubuntu.
It is our hope that packagers take interest and help adapt OpenBGPD-portable
to more distributions.

We welcome feedback and improvements from the broader community.
Thanks to all of the contributors who helped make this release
possible.