SRV Record support

[J00LZ]

SRV records would be very nice, I'll look into this myself when I have the time

The idea is quite simple, put SRV record at _aurum._tcp.example.com, pointing to https://aurum.example.com. This should then allow you to use example.com as your host in aurum, which it somehow resolves itself to the actual domain.

I've decided to make it point to the full domain, including protocol to support unusual ports and http instead of https for internal use.

[NULLx76]

Another possibility is support for Well-Known URIs [1], under for example https://example.com/.well-known/aurum, Matrix uses both of these techniques [2] so we can use that for inspiration.

1: https://tools.ietf.org/html/rfc8615
2: https://github.com/matrix-org/synapse/blob/develop/docs/delegate.md#delegation

[J00LZ]

Well-Known URIs would require a way to check if the original domain is an Aurum server or a normal http server, since unlike Matrix both run on http(s). One solution for that would be to have the aurum server also have a "valid" Well-Known URI, which simply points to itself, like "uri": "self", or the full uri if we have that readily available.

Edit: Upon looking at matrix' documentation a bit more it seems like it could be done as described in Resolving Server Names, that way the server itself would not need a Well-Knows URI for itself. This might however make things a bit more slow, since we will first need to exhaust all other options before just assumint the provided uri is the actual target