main/screen: use better patch for CVE-2021-26937

The patch from Debian will result in screen stop propertly processing
combining characters after all slots have been exhausted.
7 jobs for !18238 with screen-fix-cve-2021-26937-patch in 1 minute and 26 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Lint
passed #322148
docker-alpine x86_64
lint

00:00:19

 
  Build
passed #322153
docker-alpine ci-build aarch64
build-aarch64

00:00:46

passed #322154
docker-alpine ci-build armv7
build-armv7

00:00:53

passed #322152
docker-alpine ci-build ppc64le
build-ppc64le

00:01:07

passed #322151
docker-alpine ci-build s390x
build-s390x

00:00:37

passed #322150
docker-alpine ci-build x86
build-x86

00:00:25

passed #322149
docker-alpine ci-build x86_64
build-x86_64

00:00:58