* Makefile.in (AUTOCONF_INPUTS): New macro.
($(srcdir)/configure, $(srcdir)/src/stamp-h.in): Depend on it,
so that these files also depend on m4/getopt.m4.
* configure.in: Configure getopt by including m4/getopt.m4,
and configuring a getopt replacement if necessary.
* make-dist: Add m4 subdirectory. Unlink lib-src/getopt.h.
* m4/getopt.m4: New file.
* lib-src/Makefile.in (mostlyclean): Remove getopt.h, getopt.h-t.
(GETOPT_H): New macro, from gnulib.
(getopt.h): New rule, from gnulib.
(GETOPTOBJS): Now autoconfigured.
(GETOPTDEPS): getopt.h is now autoconfigured.
(getopt.o, getopt1.o): Depend on $(GETOPT_H), not ${srcdir}/getopt.h.
(getopt.o): Depend on ${srcdir}/gettext.h.
(movemail.o): Depend on $(GETOPT_H).
* lib-src/getopt.c, lib-src/getopt1.c: Sync from gnulib.
* lib-src/getopt_.h, lib-src/getopt_int.h, lib-src/gettext.h:
New files, from gnulib.
* lib-src/getopt.h: Removed (now is getopt_.h).
* nt/inc/gettext.h: Remove; no longer needed now that
lib-src/gettext.h exists.
* src/s/cygwin.h (C_SWITCH_SYSTEM): Remove, since gettext.h is
now part of lib-src.
(gc_cons_combined_threshold): Var deleted.
(gc_relative_threshold): New variable.
(Fgarbage_collect, init_alloc_once): Compute gc_relative_threshold
instead of gc_cons_combined_threshold.
(Fdo_applescript, Fmac_file_name_to_posix)
(Fmac_file_name_to_posix): Doc fixes.
[TARGET_API_MAC_CARBON] (Fmac_get_preference)
(Fmac_code_convert_string): Likewise.
[MAC_OSX] (init_mac_osx_environment): Fall back on terminal mode
if the executable is not contained in a bundle.
(XSetFont): Add declaration.
(mac_set_forecolor, mac_set_backcolor, mac_set_colors): Remove
functions.
(GC_FORE_COLOR, GC_BACK_COLOR, GC_FONT, MAC_WINDOW_NORMAL_GC): New
defines.
(XDrawLine, mac_draw_line_to_pixmap, XClearWindow)
(mac_draw_bitmap, XCreatePixmapFromBitmapData, XFillRectangle)
(mac_draw_rectangle, mac_draw_string_common, mac_scroll_area): Use
them.
(mac_erase_rectangle): New function.
(XClearArea, x_draw_fringe_bitmap, x_clear_glyph_string_rect)
(x_draw_stretch_glyph_string): Use it.
(XChangeGC, XCreateGC, XGetGCValues, XSetForeground)
(XSetBackground, XSetFont): Adjust for new GC implementation.
(x_draw_fringe_bitmap, x_draw_box_rect): Use GC to set colors.
(XTset_vertical_scroll_bar): Clear area under scroll bar.
