`--version` doesn't contain information about actual version and/or git commit id. HTTP API doesn't provide version also.
It makes it hard to verify what version is currently installed and running, our deploy scripts have to trust portage and sometimes just restart kapacitor for no good reason - to make sure newest version is actually the one that is running.
Steps to Reproduce:
1. # kapacitor version
Kapacitor (git: )
kapacitor version and git commit should be printed
A fix was provided in https://github.com/gentoo/gentoo/pull/12554/ but got ignored.