mod_compat_roles: Fix attempt to index a nil value #1847
permissions[] is not a map with role names as keys since 817bc9873fc2
but instead a level with host names were added. This was likely an
oversight.
Refactored towards railroad.
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>"`.
# Compatibility
------- --------------------
trunk Does not work [^1]
0.11 Should work
0.10 Should work
------- --------------------
[^1]: not after
[5f15ab7c6ae5](https://hg.prosody.im/trunk/rev/5f15ab7c6ae5)