mod_s2s_auth_dane: Disable now redundant validation done in trunk
Outgoing connections can now be validated natively in trunk since
a38f9e09ca31 so we only need to check incoming connections.
A module providing a streaming statistics interface like
[mod_statistics] but based on the new [statistics API][doc:statistics]
introduced in Prosody 0.10.
# Usage
To use, enable the built-in statistics like so:
```lua
statistics = "internal"
```
Then, in `modules_enabled`, replace `"statistics"` with
`"statistics_statsman"` and the various `"statistics_<something>"`
with equivalent `"measure_<something>"`.