Also need to clone the Multi field

Author: arp242

connector.go

@@ -447,6 +447,7 @@ type Config struct {
 	// awkward to use.
 	set []string `env:"set"`
 
+	// Only used in newConfig() and tests; joined in the Multi field at the end.
 	multiHost     []string
 	multiHostaddr []netip.Addr
 	multiPort     []uint16