nixos/collectd: Fix syntax error on some hostnames. (#20694)

MostAwesomeDude · fpletz · commit 64ef4e78ae57 · 2016-11-24T21:48:20.000+01:00
Without this, hostnames that e.g. end in digits will cause syntax errors for collectd. (cherry picked from commit 27f1def)
diff --git a/nixos/modules/services/monitoring/collectd.nix b/nixos/modules/services/monitoring/collectd.nix
@@ -9,7 +9,7 @@ let
     BaseDir "${cfg.dataDir}"
     PIDFile "${cfg.pidFile}"
     AutoLoadPlugin ${if cfg.autoLoadPlugin then "true" else "false"}
-    Hostname ${config.networking.hostName}
+    Hostname "${config.networking.hostName}"
 
     LoadPlugin syslog
     <Plugin "syslog">
