* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.

	* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.

gethostbyaddr brings in references to in6addr_any and thereby
in6addr_loopback, which aren't in all the standards containing
gethostbyaddr (gethostbyaddr is in XPG4 and UNIX98, in6addr_any and
in6addr_loopback are new in POSIX.1:2001).  This patch fixes this by
making those symbols into weak aliases (safe in this case, unlike for
most data symbols, because these data symbols are const).

Tested for x86_64 and x86 (testsuite, and comparison of disassembly of
installed stripped shared libraries).  Disassembly is unchanged for
x86_64; for x86, I see some changes of stack offsets, but no other
code generation changes or code size differences.

	[BZ #18532]
	* inet/in6_addr.c (in6addr_any): Rename to __in6addr_any and
	define as weak alias of __in6addr_any.  Use libc_hidden_data_weak.
	(in6addr_loopback): Rename to __in6addr_loopback and define as
	weak alias of __in6addr_loopback.  Use libc_hidden_data_weak.
	* include/netinet/in.h (__in6addr_loopback): Declare.  Use
	libc_hidden_proto.
	(__in6addr_any): Likewise.
	* inet/gethstbyad_r.c (PREPROCESS): Use __in6addr_any instead of
	in6addr_any.
	* conform/Makefile (test-xfail-XPG4/netdb.h/linknamespace): Remove
	variable.
	(test-xfail-UNIX98/netdb.h/linknamespace): Likewise.

	file-specific variable override so it compiles properly when using
	--with-headers.

	* NEWS: Added item for powerpc64-linux port.

	* include/libc-symbols.h [HAVE_ASM_GLOBAL_DOT_NAME]
	(C_SYMBOL_DOT_NAME): Insure that C_SYMBOL_DOT_NAME works for
	various gcc versions.  Dot names required for powerpc64.
	[HAVE_ASM_GLOBAL_DOT_NAME] (_weak_extern): Add .weakext '.'ed symbol.
	[HAVE_ASM_GLOBAL_DOT_NAME] (strong_alias): Add .global
	C_SYMBOL_DOT_NAME(alias).
	[HAVE_ASM_GLOBAL_DOT_NAME] (strong_data_alias): New macro. Same as
	original strong_alias macro.
	[HAVE_ASM_GLOBAL_DOT_NAME] (weak_alias): Add .weakext/.weak
	C_SYMBOL_DOT_NAME(alias).
	[HAVE_ASM_GLOBAL_DOT_NAME] (_symbol_version): Add .symver '.'ed name.
	[HAVE_ASM_GLOBAL_DOT_NAME] (_default_symbol_version): Add .symver
	'.'ed name.
	Add comments on libc_hidden_data_def and libc_hidden_data_weak usage.
	[HAVE_ASM_GLOBAL_DOT_NAME] (hidden_dot_def1): New macro.  Generate
	.global C_SYMBOL_DOT_NAME(alias).  Otherwise an empty macro.
	(hidden_def): Append hidden_dot_def1 macro to definition.
	(hidden_ver): Append hidden_dot_def1 macro to definition.
	(hidden_data_def): New macro.  Same as original hidden_def macro.
	(hidden_data_ver): New macro.  Same as original hidden_ver macro.
	[HAVE_ASM_GLOBAL_DOT_NAME] (hidden_dot_weak1): New macro.  Generate
	.weakext C_SYMBOL_DOT_NAME(alias).  Otherwise an empty macro.
	(hidden_weak): Append hidden_dot_weak1 macro to definition.
	(hidden_data_weak): New macro.  Same as original hidden_weak macro.
	[HAVE_ASM_GLOBAL_DOT_NAME] (HIDDEN_JUMPTARGET): Define as .__GI_name.
	Otherwise defined as __GI_name.
	(libc_hidden_data_def): New macro.  Use hidden_data_def.
	(libc_hidden_data_weak): New macro.  Use hidden_data_weak.
	(libc_hidden_data_ver): New macro.  Use hidden_data_ver.
	(rtld_hidden_data_def): New macro.  Use hidden_data_def.
	(rtld_hidden_data_weak): New macro.  Use hidden_data_weak.
	(rtld_hidden_data_ver): New macro.  Use hidden_data_ver.
	(libm_hidden_data_def): New macro.  Use hidden_data_def.
	(libm_hidden_data_weak): New macro.  Use hidden_data_weak.
	(libm_hidden_data_ver): New macro.  Use hidden_data_ver.
	* inet/in6_addr.c: Replace libc_hidden_def with libc_hidden_data_def.