* We can't use a RWMutex due to the predictor write at the end
* Return and log errors when lbv2 returns no results
* Generally increase http debug level

Half-closed connections will get sources stuck.

Drop our own XSLT template (yay), we can get the same information
using the built-in /status-json.xsl page with Icecast >= 2.4.

Use pb.Status as the node information.

At least it doesn't require sudo like using systemctl.

Export the node Status as metrics.

Also add instrumentation for the load balancer module.

We only use the proxy for Icecast streaming so there's no need to be
generic.

Includes a merge of radiod and redirectord, updates to more modern Go
idioms, adoption of the higher level etcd concurrency primitives, and
a lot of other minor implementation changes.

The refactor is still incomplete: the daemons won't compile and the
code to start the RPC servers is missing.

It should work with Debian wheezy (sysvinit) and jessie (systemd)
without having to pass a reload command as a command-line flag.

Enabled by setting the --debug-addr command-line option.

Split networking is where nodes communicate among themselves on a
private network (for example when behind a NAT infrastructure). This
change adds the --internal-ip option to radiod, that advertises a
separate IP for internal communication.

Previously the Controller would be left in a bad state on a master ->
slave transition.

The Stop() method on the liquidsoap controller could have been called
multiple times.

This will limit useless reloads (and related killSources), for instance
when transcoding parameters change. Also, improve the icecast
config generation test.

Adds optional transcoding parameters to a Mount. Each node will then
start a master election for every transcoded stream, and the master will
run liquidsoap to re-encode the data. Transcoding mounts are identical
in other respects to normal mounts, except that liquidsoap acts as a
source for them.

Adds a new metric to NodeStatus (MaxListeners) so that it is available
to the traffic control logic.