sockets enabling SO_MARK socket option which is relatively similar

 to FreeBSD's SO_USER_COOKIE giving a socket an identifier for packet filter,
 giving a specific route table.

Author: devnexen

ext/sockets/sockets.c

@@ -547,6 +547,9 @@ static PHP_MINIT_FUNCTION(sockets)
 #endif
 	REGISTER_LONG_CONSTANT("SOL_SOCKET",	SOL_SOCKET,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SOMAXCONN",		SOMAXCONN,		CONST_CS | CONST_PERSISTENT);
+#ifdef SO_MARK
+	REGISTER_LONG_CONSTANT("SO_MARK",   SO_MARK,    CONST_CS | CONST_PERSISTENT);
+#endif
 #ifdef TCP_NODELAY
 	REGISTER_LONG_CONSTANT("TCP_NODELAY",   TCP_NODELAY,    CONST_CS | CONST_PERSISTENT);
 #endif