Change customNameAllowed query param for sender (altered patch from pgerwinski)

README.md

@@ -28,7 +28,7 @@ The following list explains the usage of the parameters:
 
 * `pin` *optional*: The pin for the janus room. If the janus room has no pin, provide the value `none`. If this parameter is not provided, an input field for the pin is shown.
 
-* `customNameAllowed` *optional*: If this parameter is present (even when holding no value), an input field for a custom name is shown. The user can also update his name after starting a transmission. The names are escaped on the server to prevent Cross-Site-Scripting (XSS) attacks.
+* `customNameAllowed` *optional*: If this parameter is present (even when holding no value), an input field for a custom name is shown. If a value is provided for this field, it will be used as initial value of the input field. The user can also update his name after starting a transmission. The names are escaped on the server to prevent Cross-Site-Scripting (XSS) attacks.
 
 # Camera Server
 

sender/camera-sender.js

@@ -380,6 +380,7 @@ document.addEventListener('DOMContentLoaded', function() {
         var param = urlParams.get('customNameAllowed');
         customNameAllowed = param != null;
         if (customNameAllowed) {
+            document.getElementById('name-input').value = param;
             showElement(document.getElementById('name-control'));
         }
     }