Update Prefer list

salt/files/debian_unstable.conf

@@ -60,7 +60,11 @@ Keep: gzip libada libstdc++ libunwind
 Keep: libunwind-devel libzio make mktemp pam-devel pam-modules
 Keep: patch perl rcs timezone
 
+# Preferences based on recent Clang builds
 Prefer: libjpeg-dev
+Prefer: libncurses-dev
+Prefer: libtinfo-dev
+Prefer: libidn2-dev
 
 Prefer: cvs libesd0 libfam0 libfam-dev expect