increase live time of TURN credentials to allow for reconnections if necessary

sbin/coturn-get-credentials.py

@@ -7,7 +7,7 @@ from sys import argv
 user = argv[1]
 secret = argv[2]
 
-ttl = 1 * 3600 # Time to live
+ttl = 24 * 3600 # Time to live
 timestamp = int(time()) + ttl
 username = str(timestamp) + ':' + user
 dig = hmac.new(secret, username, hashlib.sha1).digest()