readline: Update to version 8.3 with patch version 1

readline: Update to version 8.3 with patch version 1

- Update from version 8.2 with patch version 13 to 8.3 with patch version 1
- Update of rootfile
- Changelog
    8.3
      New Features in Readline
	a. Output a newline if there is no prompt and readline reads an empty line.
	b. The history library falls back to stdio when writing the history list if
	   mmap fails.
	c. New bindable variable `search-ignore-case', causes readline to perform
	   case-insensitive incremental and non-incremental history searches.
	d. rl_full_quoting_desired: new application-settable variable, causes all
	   completions to be quoted as if they were filenames.
	e. rl_macro_display_hook: new application-settable function pointer, used if
	   the application wants to print macro values itself instead of letting
	   readline do it
	f. rl_reparse_colors: new application-callable function, reparses $LS_COLORS
	   (presumably after the user changes it)
	g. rl_completion_rewrite_hook: new application-settable function pointer,
	   called to modify the word being completed before comparing it against
	   pathnames from the file system.
	h. execute-named-command: a new bindable command that reads the name of a
	   readline command from the standard input and executes it. Bound to M-x
	   in emacs mode by default.
	i. Incremental and non-incremental searches now allow ^V/^Q (or, in the former
	   case, anything bound to quoted-insert) to quote characters in the search
	   string.
	j. Documentation has been significantly updated.
	k. New `force-meta-prefix' bindable variable, which forces the use of ESC as
	   the meta prefix when using "\M-" in key bindings instead of overloading
	   convert-meta.
	l. The default value for `readline-colored-completion-prefix' no longer has a
	   leading `.'; the original report was based on a misunderstanding.
	m. There is a new bindable command, `export-completions', which writes the
	   possible completions for a word to the standard output in a defined format.
	n. Readline can reset its idea of the screen dimensions when executing after
	   a SIGCONT.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>