v0.1-beta1

Fix some bugs and add 'extra_ip' filed of daemon configuration.

v0.1-beta

Aronet is a ipv6-based full-mesh overley network now.

For mesh, aronet uses ipsec to connect each node. For routing, aronet
uses babel to generate routing rules. For ipv4 traffic, aronet will
route v4 traffic via ipv6 nexthop supported by Linux kernel.

Aronet reserves the "{daemon.network}:ffff::/80" range for internal
usage. For example:

1. "{daemon.network}:ffff:0:0:1" will be used for aronet interface ip
2. "{daemon.network}:ffff:0:0:A" will be used for srv6 END action
3. "{daemon.network}:ffff:0:0:B" will be used for srv6 END.DX4 action

Note that srv6 END.DX4 will failed when route those traffic in xfrm
tunnel, it's a kernel bug.

v0.1-alpha

aronet can create and route full mesh overlay networks now.