Update z-wave.markdown (home-assistant#3262)

mattiasr · fabaff · commit 6f959cd16246 · 2017-08-28T11:22:01.000+02:00
* Update z-wave.markdown

spent way to long time to find this, so thought about document it down.

* Minor change
diff --git a/source/_docs/z-wave.markdown b/source/_docs/z-wave.markdown
@@ -18,7 +18,7 @@ There is currently support for climate, covers, lights, locks, sensors, switches
 
 As of version 0.45, Home Assistant automatically installs python-openzwave from PyPI as needed.
 
-There is one dependency you will need to have installed ahead of time:
+There is one dependency you will need to have installed ahead of time (included in `systemd-devel` on Fedora/RHEL systems):
 
 ```bash
 $ sudo apt-get install libudev-dev
