* include/getopt.h: But private decls inside [_GETOPT_H].

* include/getopt.h: But private decls inside [_GETOPT_H].

	Use libc_hidden_proto for getopt_long, getopt_long_only.
	* posix/getopt1.c [_LIBC]: Include <getopt.h> instead of "getopt.h".
	Add libc_hidden_def.

	* sysdeps/generic/unwind-dw2-fde-glibc.c [_LIBC] (dl_iterate_phdr):
	Define as a macro for __dl_iterate_phdr.

	* inet/getnetgrent_r.c (internal_setnetgrent): Renamed from __ name,
	made static.  Add __ name as a strong alias.
	(internal_endnetgrent): Likewise.
	(internal_getnetgrent_r): Likewise.