[Release notes] Struven ketju 4.5.0.21

[nshiell]

WLAN hotspot sharing doesn’t work if your mobile phone company gives your phone an IPv6 address only (No IPv4).

I think SailfishOS has a fix for that, I was hoping the fix would be included in this release.

Testing CLAT for IPv6-only mobile networks

As many have noticed, in some circumstances some mobile networks have started handing out only IPv6 network addresses, such as on the Xperia 10iii with your SIM in slot 1. This isn’t as dramatic as it sounds - these networks also implement DNS64 to translate IPv4 into a v6 subnet that’s routed to the v4 internet through a NAT64 host, so for the most part you wouldn’t notice. However, for connecting to literal IPv4 addresses or supporting a v4 subnet for tethering/hotspot, that’s not enough. Tha…