* configure.in (LD_SWITCH_X_SITE, C_SWITCH_X_SITE): Do not define.
* src/Makefile.in (LD_SWITCH_X_SITE): Define as a variable, not via cpp.
(LIBX_BASE): Use $LD_SWITCH_X_SITE.
* nt/config.nt (LD_SWITCH_X_SITE, C_SWITCH_X_SITE): Remove undefs.
* msdos/sed1v2.inp: Comment.
* configure.in (LD_SWITCH_X_SITE_AUX): Use AC_SUBST only, not AC_DEFINE as well.
(LD_SWITCH_X_SITE_AUX_RPATH): New output variable.
* nt/config.nt (LD_SWITCH_X_SITE_AUX): Remove.
* src/s/gnu-linux.h (LD_SWITCH_SYSTEM): Use LD_SWITCH_X_SITE_AUX as a shell
variable.
* src/s/netbsd.h (LD_SWITCH_SYSTEM_tmp): Remove.
(LD_SWITCH_SYSTEM): Use $LD_SWITCH_X_SITE_AUX_RPATH.
* src/s/openbsd.h (LD_SWITCH_SYSTEM_tmp): Remove.
(LD_SWITCH_SYSTEM): Use $LD_SWITCH_X_SITE_AUX_RPATH instead of
LD_SWITCH_SYSTEM_tmp.
* src/Makefile.in (LD_SWITCH_X_SITE_AUX, LD_SWITCH_X_SITE_AUX_RPATH):
New variables, set by configure.
* w32term.c (w32_initialize): Use GetModuleHandle for library that
is already loaded.
Set user model ID if supported (bug#1849).
* runemacs.c (set_user_model_id): New function.
(WinMain): Use it.
* emacsclient.c (w32_give_focus): Use GetModuleHandle for library
that is already loaded.
(w32_set_user_model_id): New function.
(main): Use it to associate emacsclient with emacs (bug#1849).
inc/pwd.h (struct passwd): Change the types of pw_uid and pw_gid to unsigned.
(getpwuid): Argument is now unsigned.
uid_t is now unsigned.
ntlib.c (setuid): Argument is now unsigned.
(getuid): Return value is now unsigned.
(getpwuid): Argument is now unsigned.
(fchown): UID and GID arguments are now unsigned.
ntlib.h (fchown): UID and GID arguments are now unsigned.
(getuid): Return value is now unsigned.
(setuid): Argument is now unsigned.
(getpwuid): Remove prototype (it's declared in nt/inc/pwd.h).
w32.c (getpwuid): Change argument type to unsigned.
(struct w32_id): Change type of `rid' member to unsigned.
(w32_cached_id, w32_add_to_cache, get_name_and_id): Change type of
argument ID to unsigned. All callers changed.
(getuid, geteuid, getgid, getegid): Change return type to unsigned.