Bug with IPv6 UPdate URL

[mlacunza]

Hello,
I have some sites using the latest Joomla+VM vesions. Some time ago only the sites with that config running in my server give me a lot of timeouts, refreshing page do the joomla works again until the next timeout.

With the Webfaction support team we can see the error is when the VM try to update using this IPv6 wrong address: 2607:1b00:10:a::7

Can you fix this error? Let me know if you want from me to test the patch. Thanks!