screen: Update to 4.8.0

screen: Update to 4.8.0

- Update screen from 4.2.1 to 4.8.0
- Changelog
	Version 4.8.0 (05/02/2020)
	  * Improve startup time by only polling for files to close
	  Fixes:
		- Fix for segfault if termcap doesn't have Km entry
		- Make screen exit code be 0 when checking --version
		- Fix potential memory corruption when using OSC 49
	Version 4.7.0 (02/10/2019)
	  * Add support for SGR (1006) mouse mode
	  * Add support for OSC 11
	  * Update Unicode ambiguous and wide tables to 12.1.0
	  * Fixes:
	  - cross-compilation support (bug #43223)
	  - a lot of manpage fixes and cleanups
	Version 4.6.2 (23/10/2017):
	  * Fixes:
		- revert changes to cursor position restore behavour (bug #51832)
		- set freed pointer to NULL (bug #52133)
		- documentation fixes
		- fix windowlist crashes (bug #43054 & #51500)
	Version 4.6.1 (10/07/2017):
	  * Fixes:
		- problems with starting session in some cases
		- parallel make install
		- segfault when querying info on nonUTF locale (bug #51402)
	Version 4.6.0 (28/06/2017):
	  * Update Unicode wide tables to 9.0 (bug #50044)
	  * Support more serial speeds
	  * Improved namespaces support
	  * Migrate from fifos to sockets
	  * Start viewing scrollback at first line of output (bug #49377)
	Version 4.5.1 (25/02/2017):
	  * Fixes:
		- logfile permissions problem (CVE-2017-5618)
		- SunOS build problem (bug #50089)
		- FreeBSD core dumps (bug #50143)
	Version 4.5.0 (10/12/2016):
	  * Allow specifying logfile's name via command line parameter '-L'
	  * Fixes:
		- broken handling of "bind u digraph U+" (bug #48691)
		- crash with long $TERM (bug #48983)
		- crash when bumping blank window
		- build for AIX (bug #49149)
		- %x improperly separating arguments
		- install with custom DESTDIR (bug #48370)
	Version 4.4.0 (19/06/2016):
	  * Support up to 24 function keys
	  * Fix runtime issues
	  * 'logfile' command, starts logging into new file upon changing
	Version 4.3.1 (28/06/2015):
	  * Fix resize bug
	Version 4.3.0 (13/06/2015):
	  * Introduce Xx string escape showing the executed command of a window
	  * Implement dead/zombie window polling, allowing for auto reconnecting
	  * Allow setting hardstatus on first line
	  New Commands:
	  * 'sort' command sorting windows by title
	  * 'bumpleft', 'bumpright' - manually move windows on window list
	  * 'collapse' removing numbering 'gaps' between windows, by renumbering
	  * 'windows' command now accepts arguments for use with querying
- Rootfile updated
- Two screen patchfiles deleted as the patch changes are now built into
	the source files

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