wireguard: add EndpointAddress.Name() removing the domain from Host

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/wireguard/config.go

@@ -49,6 +49,12 @@ type EndpointAddress struct {
 	Port uint16
 }
 
+// Name returns the first part of a hostname
+func (ep EndpointAddress) Name() string {
+	before, _, _ := strings.Cut(ep.Host, ".")
+	return before
+}
+
 func (ep EndpointAddress) String() string {
 	switch {
 	case ep.Host == "":