Updates the DTLS server to skip serving a DTLS connection when an error is returned. Previously, if an error was returned that did not meet the criteria of shutting down the server altogether, a non-nil DTLS connection would still attempt to be served. This can cause a panic if the net.Conn interface is non-nil, but the underlying value is.
Updates the DTLS server to skip serving a DTLS connection when an error is returned. Previously, if an error was returned that did not meet the criteria of shutting down the server altogether, a non-nil DTLS connection would still attempt to be served. This can cause a panic if the net.Conn interface is non-nil, but the underlying value is.
Fixes #488