Also fixes non-recursive resolve erring instead showing one step.
The patch of core/commands/resolve.go could be done better but I don't
know how to get access to ErrResolveRecursion.
It allows for dnslinks into sub-segments. So for example hosting
multiple blogs
on just domains from one pubkey.
Fixes#2059
Add tests and fix case when dnslinks references dnslink
License: MIT
Signed-off-by: Jakub (Kubuxu) Sztandera <kubuxu@gmail.com>