* readline.c (_rl_output_character_function), display.c:

	* readline.c (_rl_output_character_function), display.c:
	Return int, not void, to conform with the expected arg of tputs.
	* readline.c (init_terminal_io):  tgetflag only takes 1 arg.
	* readline.c (_rl_savestring):  New function.
	* chardefs.h:  To avoid conflicts and/or warnings, define
	savestring as a macro wrapper for _rl_savestring.
	* display.c (extern term_xn):  It's an int flag, not a string.
	* charsdefs.h, rldefs.h:  Remove HAVE_STRING_H-related junk.