Fix netenv linter errors

netenv/environment_windows.go

@@ -2,10 +2,12 @@ package netenv
 
 import "net"
 
+// Nameservers returns the currently active nameservers.
 func Nameservers() []Nameserver {
 	return nil
 }
 
+// Gateways returns the currently active gateways.
 func Gateways() []*net.IP {
 	return nil
 }