There's no way to stop a server other than exiting the program

[AmanitaVerna]

This seems like a problem if you want to, say, include a feature to change the port via the gowut interface, but can't actually shut down and restart the server.

Googling indicates that it is possible. See for example https://github.com/tylerb/graceful

[willauld]

I'd second this enhancement. Would the following be directly useful?
https://golang.org/pkg/net/http/#Server.Shutdown

[icza]

Yes, the graceful shutdown addition in Go 1.8 can be used for this.