Release 0.5.1 version
This release adds a thread to check if the workers of haproxystats-process* are alive. This thread will exit the main program if at least one worker isn't alive. Last but not least, @crovner fixed a runtime error, thanks dude.
Changelog:
- Fix runtime error when specifying a custom list of metrics
- Check liveness of workers and exit if at least one is dead
- Fix formatting in README for group-namespace option