Fix exim-cron.sh again to work with non-gnu-xargs

Author: drscream

copy/opt/core/bin/exim-cron.sh

@@ -83,5 +83,5 @@ if [ -x /opt/local/sbin/exim_tidydb ]; then
   cd $SPOOLDIR/db || exit 0
   find * -maxdepth 1 \( -name '*.lockfile' -or -name 'log.*' \) \
     -and -type f -print0 | \
-    sudo -u mail xargs -0r -n 1 /opt/local/sbin/exim_tidydb $SPOOLDIR > /dev/null
+    sudo -u mail xargs -0 -n 1 /opt/local/sbin/exim_tidydb $SPOOLDIR > /dev/null
 fi