dtfscript: Rename DTF_RC_DIR

.dtfscripts/dtfscript

@@ -64,14 +64,14 @@ fi
 
 ## Set some more variables
 export DTF_HOME="$HOME/.dtfscripts"
-export DTF_RC_DIR="$DTF_HOME/devices"
+export DTF_DEVICES_DIR="$DTF_HOME/devices"
 export DTF_SERVICES_DIR="$DTF_HOME/services"
 export DTF_TASKS_DIR="$DTF_HOME/tasks"
 
 ## Load device-specific scripts
 if [[ -x "$DTF_HOME/devices/$(hostname).rc" ]]; then
 	dtf_log "Sourcing devices/$(hostname).rc"
-	source "$DTF_RC_DIR/$(hostname).rc"
+	source "$DTF_DEVICES_DIR/$(hostname).rc"
 fi
 
 ## Determine which tasks to run