* Add a timeout option to connectivity checking.
* Support configuring veth interfaces in nmtui.
* When looking up the system hostname from the reverse DNS lookup of
  addresses configured on interfaces, NetworkManager now takes into
  account the content of /etc/hosts.
* Revert to using sysctl ipv6.conf.default for ip6-privacy
* Allow specifying a system OVS interface by MAC address
* ndisc: Support multiple gateways for a single network