Subject: Add documentation key to system unit file
Author: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
Date: 2018-08-12
Bug: https://github.com/latchset/tang/issues/49

--- a/units/tangd@.service.in
+++ b/units/tangd@.service.in
@@ -1,5 +1,6 @@
 [Unit]
 Description=Tang Server
+Documentation=man:tangd(8)
 
 [Service]
 StandardInput=socket