gdb/

gdb/
	Implement auto-load user conveniences suggested by Doug Evans.
	* auto-load.c: Include top.h.
	(file_is_auto_load_safe): New variable advice_printed.  Print advice.
	(_initialize_auto_load): New variable scripts_directory_help.  Mention
	GDBPY_AUTO_FILE_NAME and GDB_AUTO_FILE_NAME for set auto-load
	scripts-directory.  Document in online help one can use also files for
	set auto-load safe-path.
	* python/py-auto-load.c: (GDBPY_AUTO_FILE_NAME): Move it from here ...
	* python/python.h (GDBPY_AUTO_FILE_NAME): ... to here.