2e2a806 Fix copyright years by hand
5badc81 Update copyright year to 2017

Run admin/update-copyright.

This follows up on recent problems with the fact that config.h
includes stdlib.h etc.; some files need to include stdlib.h later.
config.h generally should limit itself to includes that are
universally safe; outside of MS-Windows, only stdbool.h makes
the cut among the files currently included.  So, move the
other includes to just the files that need them (Bug#24506).
* configure.ac (config_opsysfile): Remove, as this generic hook
is no longer needed.
* lib-src/etags.c, src/unexmacosx.c, src/w32.c, src/w32notify.c:
* src/w32proc.c (_GNU_SOURCE):
Remove, as it’s OK for config.h to do this now.
* src/conf_post.h: Include <ms-w32.h>, instead of the generic
config_opsysfile, for simplicity as this old way of configuring is
now done only for the MS-Windows port.  Do not include <ms-w32.h>
if DEFER_MS_W32_H, for the benefit of the few files that want its
effects later.  Do not include <alloca.h>, <string.h>, or
<stdlib.h>.  Other files modified to include these headers as
needed, or to not include headers that are no longer needed.
* src/lisp.h: Include <alloca.h> and <string.h> here, since
some of the inline functions need them.
* src/regex.c: Include <alloca.h> if not emacs.  (If emacs,
we can rely on SAFE_ALLOCA.)  There is no longer any need to
worry about HAVE_ALLOCA_H.
* src/unexmacosx.c: Rely on config.h not including stdlib.h.
* src/w32.c, src/w32notify.c, src/w32proc.c (DEFER_MS_W32_H):
Define before including <config.h> first, and include <ms-w32.h>
after the troublesome headers.

* lwlib/lwlib.c (lw_get_all_values): Always check the value returned by
get_widget_info.

Run admin/update-copyright.

Run admin/update-copyright.

* lwlib/lwlib.h (widget_value): Do not maintain a free list any more.
(malloc_widget_value, free_widget_value): Remove prototypes.
* lwlib/lwlib.c (malloc_widget_value, free_widget_value):
(widget_value_free_list, malloc_cpt): Remove.
(free_widget_value_tree, copy_widget_value_tree): Adjust users.
* src/menu.h (xmalloc_widget_value): Replaced by ...
(make_widget_value): ... new prototype.
* src/menu.c (xmalloc_widget_value): Replaced by ...
(make_widget_value): ... new function.
(free_menubar_widget_value_tree, digest_single_submenu): Adjust users.
* src/gtkutil.c (malloc_widget_value, free_widget_value):
(widget_value_free_list, malloc_cpt): Remove old lwlib-compatible code.
* src/keyboard.h (enum button_type, struct _widget_value):
* src/gtkutil.h, src/nsgui.h, src/w32gui.h (malloc_widget_value):
(free_widget_value): Likewise.
* src/nsmenu.m (ns_update_menubar, ns_menu_show):
* src/w32menu.c (set_frame_menubar, w32_menu_show, w32_dialog_show):
* src/xmenu.c (set_frame_menubar, xmenu_show, x_dialog_show): Adjust users.
* src/xterm.h (XtParent) [USE_GTK]: Remove unused macro.

* lwlib.h (safe_strdup): Remove prototype.
* lwlib.c (safe_strdup, safe_free_str): Remove.
(copy_widget_value_tree, allocate_widget_info, free_widget_info):
(merge_widget_value): Prefer xstrdup, xfree and dupstring.
* lwlib-Xm.c (make_destroyed_instance, xm_update_one_value): Ditto.

* lib-src/ebrowse.c (xstrdup):
* lib-src/etags.c (savenstr):
* lwlib/lwlib.c (safe_strdup):
* src/xfns.c (xic_create_fontsetname):
* src/xrdb.c (gethomedir): Prefer tail calls.
* lib-src/etags.c (concat): Omit unnecessary assignment.