Feature Request: DNS-SD auto-completion for Lagrange

[sirnewton01]

On a local network or for a particular domain on the internet there could be Gemini sites registered with DNS service discovery mechanism. See the RFC here for more details: https://datatracker.ietf.org/doc/html/rfc6763

I think that instead of relying on search engines so much, Gemini capsules could be discovered in this way using Lagrange.

Within a particular search domain, "sdomain" there can be DNS records like this:

PTR: _gemini._tcp.sdomain,mycapsule._gemini._tcp.sdomain
SRV: mycapsule._gemini._tcp.sdomain,mycapsule,1965
TXT: mycapsule._gemini._tcp.sdomain,path=/

These records would allow one to get a list of all Gemini capsules on a particular domain using standard DNS lookups on the OS or even the "dig" cross-platform command-line tool. From these, one can assemble a user friendly name, eg. "mycapsule" along with some user visible properties in the TXT record. Also, there is enough information to assemble the URI to put in the Lagrange address bar so that the user can go to that capsule right away.

I think that in terms of Lagrange this could be used to auto-complete local capsules wen the user click on a blank address bar based on the local search domain. As the user begins typing, if what they type is a valid DNS domain then DNS lookups could be used to fill the list for sites in that domain, eg. "sdomain"