Replace the activeuserservice.js with a command-line option to fingerservice.js

since activeuserservice.js was just a copy/paste of fingerservice.js to begin
with. Replace the "command" value for the ActiveUser and ActiveUser-UDP
services in ctrl/services.ini with "fingerservice.js -u".

ctrl/services.ini

@@ -62,13 +62,13 @@ Command=mspservice.js
 ; Active User service
 [ActiveUser]
 Port=11
-Command=activeuserservice.js
+Command=fingerservice.js -u
 
 ; Active User service
 [ActiveUser-UDP]
 Port=11
 Options=UDP
-Command=activeuserservice.js
+Command=fingerservice.js -u
 
 ; QOTD service
 [QOTD]