* include/libc-symbols.h (__hidden_proto): Remove bogus declaration

* include/libc-symbols.h (__hidden_proto): Remove bogus declaration

	of internal.
	(__hidden_def1, __hidden_dot_def1): Remove.
	(__hidden_def2, __hidden_def3): Remove.
	(__hidden_ver1): New.
	(hidden_ver, hidden_def, hidden_weak): Use it.
	(hidden_data_ver, hidden_data_ver, hidden_data_weak): Use non-data
	version of the macro.

	* include/wchar.h (__wcscoll): Remove.
	* wcsmbs/wcscoll.c: Define wcscoll directly instead of via __wcscoll.
	* string/strcoll.c: Don't issue libc_hidden_def STRCOLL redefined.