Configurable cookie name

auth.php

 		global $DB, $login, $CFG;
 		$placeholders[0] = "/{{firstname}}/";
 		$placeholders[1] = "/{{lastname}}/";
-		if(!empty($_COOKIE['das-macaroon'])) {
+		if(!empty($_COOKIE[$this->config->cookie_name])) {
 			try {
-				$m = Macaroon::deserialize($_COOKIE['das-macaroon']);
+				$m = Macaroon::deserialize($_COOKIE[$this->config->cookie_name]);
 				$v = new Verifier();
 				$v->setCallbacks([
 					function($a) {
 	 * Processes and stores configuration data for this authentication plugin.
 	 */
 	function process_config($config) {
-		if(!isset($config->email_config)) {
-			$config->email_config = '';
+		if(!isset($config->cookie_name)) {
+			$config->cookie_name = '';
 		}
 		if(!isset($config->secret)) {
 			$config->secret = '';
 		}
+		if(!isset($config->email_config)) {
+			$config->email_config = '';
+		}
 
-		set_config('email_config', $config->email_config, self::COMPONENT_NAME);
+		set_config('cookie_name', $config->cookie_name, self::COMPONENT_NAME);
 		set_config('secret', $config->secret, self::COMPONENT_NAME);
+		set_config('email_config', $config->email_config, self::COMPONENT_NAME);
 		return true;
 	}
 

config.html

 <?php
-	if(!isset($config->email_config)) {
-		$config->email_config = '';
+	if(!isset($config->cookie_name)) {
+		$config->cookie_name = '';
 	}
 	if(!isset($config->secret)) {
 		$config->secret = '';
 	}
+	if(!isset($config->email_config)) {
+		$config->email_config = '';
+	}
 ?>
 <table cellspacing="0" cellpadding="5" border="0">
 	<tr>
 	</tr>
 	<tr>
 		<td align="right">
+			<label for="cookie_name">Cookie name</label>
+		</td>
+		<td>
+			<input name="cookie_name" id="cookie_name" type="text" size="50" value="<?php echo $config->cookie_name; ?>" />
+		</td>
+		<td>Name of the cookie your macaroon is located in.</td>
+	</tr>
+	<tr>
+		<td align="right">
 			<label for="secret">Secret</label>
 		</td>
 		<td>