ed: Update to version 1.20

ed: Update to version 1.20

- Update from version 1.19 to 1.20
- Update of rootfile not required
- Changelog
    1.20
	New command-line options '+line', '+/RE', and '+?RE' have been implemented to
	  set the current line to the line number specified or to the first or last line
	  matching the regular expression 'RE'.
	  (Suggested by Matthew Polk and John Cowan).
	File names containing control characters 1 to 31 are now rejected unless they
	  are allowed with the command-line option '--unsafe-names'.
	File names containing control characters 1 to 31 are now printed using octal
	  escape sequences.
	Ed now rejects file names ending with a slash.
	Intervening commands that don't set the modified flag no longer make a second
	  'e' or 'q' command fail with a 'buffer modified' warning.
	Tilde expansion is now performed on file names supplied to commands; if a file
	  name starts with '~/', the tilde (~) is expanded to the contents of the
	  variable HOME. (Suggested by John Cowan).
	Ed now warns the first time that a command modifies a buffer loaded from a
	  read-only file. (Suggested by Dan Jacobson).
	Ed now creates missing intermediate directories when writing to a file.
	It has been documented that 'e' creates an empty buffer if file does not exist.
	It has been documented that 'f' sets the default filename, whether or not its
	  argument names an existing file.
	The description of the exit status has been improved in '--help' and in the
	  manual.
	The variable MAKEINFO has been added to configure and Makefile.in.
	It has been documented in INSTALL that when choosing a C standard, the POSIX
	  features need to be enabled explicitly:
	   ./configure CFLAGS+='--std=c99 -D_POSIX_C_SOURCE=2'

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