modopts.ini setting to disable new-user survey question

Set survey=false in the [newuser] section of modopts.ini to disable the
"Where did you hear about this BBS?" new user question.

exec/newuser.js

@@ -28,7 +28,7 @@ if(options.send_newuser_welcome)	// backwards compatibility hack
 
 console.clear();
 
-if(!user.address.length && user.number>1) {
+if(!user.address.length && user.number>1 && options.survey !== false) {
 	print("\1y\1hWhere did you hear about this BBS?");
 	user.address=console.getstr(30,K_LINE);
 }