Support arbitrary options in the configuration file

[pavlozt]

Sometimes (and in the future) it becomes necessary to add options that the role creator did not provide
For example, I need override backoff_config. But I don't find any global level variable.
Other people have also mentioned limits_config, etc.

[pavlozt]

Ok. This is not so actual options. backoff_config is part of promtail_config_clients.

[patrickjahns]

I understand your request - how would you propose that this could be best addressed and resolved?
Is it possible to address this without introducing a breaking change to the current behaviour ?

[pavlozt]

@patrickjahns I suggest leaving everything as is. promtail_config_clients solves the problem.
There are not many options in this program and I have no burning practical need