Description:
------------
No valid parameter exists for stream_socket_sendto with unix sockets; you can call it but it won't work under any circumstances.



Reproduce code:
---------------
<?php
	/* Because we can't open a unix socket without specifying a path,
		specify a dummy path. Note that we use "0" for flags so it doesn't
		connect.
	*/
	error_reporting(E_ALL);
	
	$sockpath = "/tmp/testsocket";
	$errno = 0;
	$errstr = "";
	$sock = stream_socket_server("udg://$sockpath", $errno, $errstr, 0 /* Flags*/ );

	$msg = "Hello";	
	stream_socket_sendto($sock, $msg, 0 /* flags */, "udg:///tmp/anothersocket");
?>


Expected result:
----------------
Send a Unix datagram containing "Hello" to socket /tmp/anothersocket



Actual result:
--------------
Warning: stream_socket_sendto(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/mark/progs/betterforum/site/udgsendtotest.php on line 14

Warning: stream_socket_sendto(): Failed to parse `udg:///tmp/anothersocket' into a valid network address in /home/mark/progs/betterforum/site/udgsendtotest.php on line 14