screen: Update version to 4.9.1

Update screen to 4.9.1.

More importantly, don't install screen as setuid-root. this is
only required for Multiuser Sessions, which are probably not used in our
environment.

Screen has a lot of setuid-root related security problems. [1]

Do not update to 5.0.0 yet.

[1]: https://www.openwall.com/lists/oss-security/2025/05/12/1

screen.be0

@@ -1,11 +1,9 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION screen-4.8.0-0
+# BEE_VERSION screen-4.9.1-0
 
 # SRCURL[0]="https://ftp.gnu.org/gnu/screen/screen-${PKGVERSION}.tar.gz"
-SRCURL[0]="https://beehive.molgen.mpg.de/d276213d3acd10339cd37848b8c4ab1e/screen-4.8.0.tar.gz"
-
-PATCHURL+=("https://beehive.molgen.mpg.de/2dbc5ab417813c99c8baee85ca981ea0/screen-no-chown.patch")
+SRCURL[0]="https://beehive.molgen.mpg.de/9a9bdc956bd93e4f0cb9e48678889e26/screen-4.9.1.tar.gz"
 
 # build_in_sourcedir
 
@@ -33,3 +31,10 @@ mee_configure() {
 #mee_install() {
 #    bee_install
 #}
+
+mee_install_post() {
+    (
+        find $D -type f -perm /4000 -exec chmod u-s {} \;
+        find $D -type f -perm /2000 -exec chmod g-s {} \;
+    )
+}