sed: Update to 4.8

sed: Update to 4.8

- Update sed from 4.4 to 4.8
- Updated rootfile
- Changelog
	* Noteworthy changes in release 4.8 (2020-01-14) [stable]
		** Bug fixes
		- "sed -i" now creates temporary files with correct umask (limited to u=rwx).
		  Previously sed would incorrectly set umask on temporary files, resulting
		  in problems under certain fuse-like file systems.
		  [bug introduced in sed 4.2.1]
		** Release
		  distribute gzip-compressed tarballs once again
		** Improvements
		  a year's worth of gnulib development, including improved DFA performance
	* Noteworthy changes in release 4.7 (2018-12-20) [stable]
		** Bug fixes
		- Some uses of \b in the C locale and with the DFA matcher would fail, e.g.,
		  the following would mistakenly print "123-x" instead of "123":
		    echo 123-x|LC_ALL=C sed 's/.\bx//'
		- Using a multibyte locale or certain regexp constructs (some ranges,
		  backreferences) would avoid the bug.  [bug introduced in sed 4.6]
	* Noteworthy changes in release 4.6 (2018-12-19) [stable]
		** Improvements
		- sed now prints a clear error message when r/R/w/W (and s///w) commands
		  are missing a filename. Previously, w/W commands would fail with confusing
		  error message, while r/R would be a silent no-op.
		- sed now uses fully-buffered output (instead of line-buffered) when
		  writing to files. This should noticeably improve performance of "sed -i"
		  and other write commands.
		  Buffering can be disabled (as before) with "sed -u".
		- sed in non-cygwin windows environments (e.g. mingw) now properly handles
		  '\n' newlines in -b/--binary mode.
		** Bug fixes
		- sed no longer accesses invalid memory (heap overflow) when given invalid
		  backreferences in 's' command [bug#32082, present at least since sed-4.0.6].
		- sed no longer adds extraneous NUL when given s/$//n command.
		  [related to bug#32271, present since sed-4.0.7]
		- sed no longer accesses invalid memory (heap overflow) with s/$//n regexes.
		  [bug#32271, present since sed-4.3].
		** New Features
		  New option, --debug: print the input sed script in canonical form
		  and annotate program execution.
	* Noteworthy changes in release 4.5 (2018-03-31) [stable]
		** Bug fixes
		- sed now fails when matching very long input lines (>2GB).
		  Before, sed would silently ignore the regex without indicating an
		  error. [Bug present at least since sed-3.02]
		- sed no longer rejects comments and closing braces after y/// commands.
		  [Bug existed at least since sed-3.02]
		- sed -E --posix no longer ignores special meaning of '+','?','|' .
		  [Bug introduced in the original implementation of --posix option in
		  v4.1a-5-gba68fb4]
		- sed -i now creates selinux context based on the context of the symlink
		  instead of the symlink target. [Bug present since at least sed-4.2]
		- sed -i --follow-symlinks remains unchanged.
		- sed now treats the sequence '\x5c' (ASCII 92, backslash) as literal
		  backslash character, not as an escape prefix character.
		  [Bug present since sed-3.02.80]
		  Old behavior:
		     $ echo z | sed -E 's/(z)/\x5c1/' # identical to 's/(z)/\1/'
		     z
		  New behavior:
		     $ echo z | sed -E 's/(z)/\x5c1/'
		     \1

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