Updated openid library to version 2.1.3.

lib/Auth/OpenID.php

lib/Auth/OpenID/AX.php

lib/Auth/OpenID/Association.php

lib/Auth/OpenID/BigMath.php

lib/Auth/OpenID/Consumer.php

lib/Auth/OpenID/CryptUtil.php

lib/Auth/OpenID/DatabaseConnection.php

lib/Auth/OpenID/DiffieHellman.php

lib/Auth/OpenID/Discover.php

lib/Auth/OpenID/DumbStore.php

lib/Auth/OpenID/Extension.php

lib/Auth/OpenID/FileStore.php

lib/Auth/OpenID/HMAC.php

lib/Auth/OpenID/Interface.php

lib/Auth/OpenID/KVForm.php

lib/Auth/OpenID/MemcachedStore.php

lib/Auth/OpenID/Message.php

lib/Auth/OpenID/MySQLStore.php

lib/Auth/OpenID/Nonce.php

lib/Auth/OpenID/PAPE.php