Fixes docs troubleshooting language around low MTU. In fact, we see
conenctions hanging rather than just showing low performance, since
packets are dropped rather than fragmented.
---------
Co-authored-by: Edward Angert <EdwardAngert@users.noreply.github.com>
Co-authored-by: EdwardAngert <17991901+EdwardAngert@users.noreply.github.com>
> We do not use Tailscale (product) but instead import Tailscale OSS
libraries which has some nice ways of handling Wireguard. We also use
Tailscale's logo in our architecture, but calling it only `Tailscale`
seems to throw people off when they're considering Coder and how it
works.
I've left it wherever it seems to make sense (such as when we talk about
[DERP](https://coder.com/docs/admin/networking#relayed-connections)),
and sprinkled some `Wireguard` and `websocket/HTTPS` where I could
