screen: update 4.9.0 -> 4.9.1

screen: update 4.9.0 -> 4.9.1

* Support stop/parity bits on serial port
* Add needed system headers in checks and return values for implicit function declarations
* Fixes:
   - Avoid zombies after shell exit
   - Missed signal sending permission check on failed query messages (CVE-2023-24626)
   - manpage fixes
   - source code fixes during cleanup
   - UTF-8 encoding can emit invalid UTF-8 sequences for out of range unicode values

Remove patches; they are merged upstream or backported.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 2566f8e51d56848d8b28f37462160e90253b79fc)
Signed-off-by: Steve Sakoman <steve@sakoman.com>