* miscfuncs.cc (RtlFillMemory): Declare.
	(RtlCopyMemory): Declare.
	(memset): Just call RtlFillMemory.
	(memcpy): Just call RtlCopyMemory.
	* mmap.cc (class mmap_record): Drop enforced packing.  Reorder members
	to allow tight packing on 32 as well as on 64 bit.
	* include/sys/dirent.h: Don't enforced structure packing on x86_64.
	(__DIRENT_COOKIE): Use different value on 64 bit.
Pull in changes from HEAD
	* fhandler_socket.cc (fhandler_socket::bind): Fix error code for
	empty filename.