* ar.c (replace_members): In verbose messages, use 'r' when

	* ar.c (replace_members): In verbose messages, use 'r' when
        replacing a member, and 'a' when adding one.

	* ar.c (truncate): New static variable.
	(normalize): Change return type to const char *.  Add abfd
	argument.  Change all callers.  If truncate, chop the filename to
	abfd->ar_max_namelen.
	(main): For the 'f' modifier, set truncate to true.  Don't change
	quick_append to replace to truncate is true.
	(do_quick_append): If truncate, set BFD_TRADITIONAL_FORMAT.
	(write_archive): Likewise.
	* binutils.texi, ar.1: Document 'f' modifier.
PR 6888.