* Makefile.in (DLL_OFILES): Add getopt.o and iruserok.o.

	* Makefile.in (DLL_OFILES): Add getopt.o and iruserok.o.
	* cygwin.din: Export __check_rhosts_file, __rcmd_errstr, optarg,
	opterr, optind, optopt, optreset, getopt, getopt_long, iruserok
	and ruserok.
	* getopt.c: Moved from lib to here.  Define opt* variables as
	dllexport.
	* iruserok.c: Moved from lib to here.  Rearrange function order.
	Prefer using 64/32 bit functions.
	* syscalls.cc (shell_fp): Define as struct __sFILE64.
	(getusershell): Use fopen64 instead of fopen.
	* winsup.h: Add declarations for seteuid32, fopen64,
	cygwin_gethostbyname and cygwin_inet_addr.
	* include/getopt.h: Declare opt* variables dllimport.
	* include/cygwin/version.h: Bump API minor number.