LookupWellKnown doesn't specify user agent

[pieterhollander]

Background information

• Dendrite version or git SHA: v0.3.5
• Monolith or Polylith?: Monolith
• SQLite3 or Postgres?: postgres
• Running in Docker?: no
• go version: go1.15.2 linux/amd64

Description

Right now, Dendrite identifies itself with the User-Agent string Go-http-client/2.0. This should be something like Dendrite/0.3.5, just as Synapse does.

Steps to reproduce

• Tail your web server access logs for /.well-known/matrix/server
• Dendrite identifies itself as Go-http-client/2.0
• Synapse identifies itself as Synapse/1.24.0

[tulir]

Note that this only applies to .well-known requests, not federation requests in general.

[kegsay]

I was going to say, I thought we did as per https://github.com/matrix-org/dendrite/blob/v0.3.8/setup/base.go#L313

[neilalexander]

Well-known requests are exempt from that because LookupWellKnown in gmsl doesn't use the Client or FederationClient from setup.

Moving this issue to the gmsl repo.