[CentOS-mirror] Add IPv6

[Anssi Johansson]

admin at dedic.sh kirjoitti 4.2.2019 klo 11.58:
> Hello, please, add ipv6 address for mirror dedic.sh in Moscow, Russia.
> Address is 2001:67c:1688:b::

Hi, this has now been added, so you should now be able to rsync from 
msync.centos.org over IPv6.

There's a slight (firewall?) issue with your mirror, though:

$ curl -6v http://dedic.sh/centos/timestamp.txt
* About to connect() to dedic.sh port 80 (#0)
*   Trying 2001:67c:1688:b::...
* Permission denied
* Failed connect to dedic.sh:80; Permission denied
* Closing connection 0
curl: (7) Failed connect to dedic.sh:80; Permission denied

Maybe this could be fixed? Once the issue is fixed, your mirror will no 
longer be listed as failing on http://miuku.net/ipv6reach/ (the list is 
updated only every three hours).