libknet-dev universe dependency

[Andreas Hasenack]

corosync is a sync from debian, and in version 3.0.0-1 they added a dependency on libknet-dev (kronos net). In Ubuntu, libknet-dev is in universe.

https://salsa.debian.org/ha-team/corosync/commit/ca28efda4c8647ba262367c076e54d4787f529e0
https://salsa.debian.org/ha-team/corosync/commit/f69e2aa8b8f0fa3895f791a4706f7fdacb53b270

Some bullet points copied from https://github.com/corosync/corosync/wiki/Corosync-3.0.0-Release-Notes:
- Corosync 3.0 contains many interesting features mostly related to usage of Kronosnet (https://kronosnet.org/) as a default (and preferred) network transport.
- UDP/UDPU transports are still present, but supports only single ring (RRP is gone in favor of Knet) and doesn't support encryption
- Corosync 3 is not wire compatible with previous versions. Needle was patched so it will display warning message when receive corosync 3 packet (and vice-versa).
- NSS dependency removal - not needed anymore because crypto is now handled by knet, so no replacement needed. This change affects only cpgverify where packet format is changed.

[Andreas Hasenack (ahasenack)]

MIR being prepared: https://bugs.launchpad.net/ubuntu/+source/kronosnet/+bug/1811139

[Rafael David Tinoco (rafaeldtinoco)]

MIR at LP: #1811139 has been Fix Released. Marking this as Fix Released as well.