Faucet

* Ryu 4.22
* Fix more bugs with stacked and non-stacked DPs under same controller.
* Interface mirrors can mirror more than one interface
* Can now configure multiple ACLs on same interface/VLAN
* Fix crash with status message from unknown port
* Fix port name references in ACLs for mirror ports
* Fix permanent drop of dead nexthop
* Increase unit test coverage to 72%

* L3: 90% drop in packet in rate, and 50% drop in packet out (offloading of down nexthops to DP)
* L2: cold start learning optimization
* Fix OFMeters in ACLs
* Fix stack/non-stack DP combination
* Documentation updates (including NoviFlow pipeline)
* LLDP beacon service can default TLVs (including system/port name)
* Document/docker use of TLS for OpenFlow
* New standard FAUCET startup script (better multiplatform support)
* Port level opstatus_reconf: False feature allows FAUCET to ignore op status on a port
* Unit test coverage improvements

* initial LLDP beacon service
* mirror interfaces shouldn't have any VLAN processing enabled
* reset L3 resolver when a L3 DP is cold started
* ACL rule description now actually can be used
* stack and non-stack DPs can be controlled by same controller

Point release for NZNOG18 deployment.
* Watchers can output to multiple databases
* Allow OFPP_LOCAL port to be configured.

* more config checks for inconsistent keys, and packet in consistency checks
* fix truncation of icmpv6 echo to FAUCET VIP
* fix IVR not working after warm start
* fix stale port config after warm start with ACL only change
* fix incorrect add order for meters
* IP parse header size check was too conservative
* output_only port option
* cookie can be configured for ACL rules
* ACLs can call OF set_field
* ACL rules can have description field

* Prometheus flow table and port status logging support. Prometheus-only is now recommended for all Gauge monitoring
* Ryu 4.21
* Fix theoretical crash if OFA sends as a packet with no VLAN header (should not occur anyway) - found by packet in fuzzer
* Optional ARP/ND re-resolution targeting (first ARP/ND attempt is sent only to last known port)
* Experimental event notification has better error handling (and rejection of multiple clients)
* Packet fuzzer performance improvements
* Optional setting to not check minimum packet size (for OVS FAUCET tutorial to work)
* Tests all retry failed pip installs due to temporary pip CDN problems.
* Remove support for old style OF matches (nw6_src, dl_type et a).