updated config reference

Daemon-Config-Reference.md

@@ -6,9 +6,11 @@ This file must be in the same directory as the binary.
 ### Configuration Values
 `port` : The port where the server listens. Must be a valid port.
 `interface` : The sniffer interface you want to use.
+`userdatabase` : The file where userdata is stored in format: user;password
 
 ### Example for config.txt
 ```
 port=1234
 interface=lo
+userdatabase=userStorage.text
 ```