* strings.c: Include config.h before bfd.h.

	* strings.c: Include config.h before bfd.h.
	(file_off): New type.
	(file_open): Define.
	(print_strings): Use file_off instead of file_ptr.  Print addresses
	which don't fit into long correctly.
	(get_char): Use file_off instead of file_ptr.  Use getc_unlocked if
	available.
	(strings_file): Use file_off instead of file_ptr.  Use file_open.
	* configure.in: Check for getc_unlocked.
	Check for fopen64 and whether _LARGEFILE64_SOURCE needs to
	be defined for it.
	* configure: Rebuilt.
	* config.h.in: Rebuilt.