* Upgrade to Go 1.21
* event: remove tests depending on pointer comparison
The test now just tests that the logger is non-nil. For
some reason the old test was broken by upgrading
to Go 1.21.0.
* api: use dummy Host header for unix sockets
When using unix sockets with the net/http.Client,
we cannot use the unix socket address directly
in the Host header, as it fails the validation step.
Instead, use a dummy address in the Host header.
Johan Brandhorst-Satzkorn
e108ae40ad