Avoid killing mdmon at shutdown/reboot

bootscripts/lfs/init.d/sendsignals

@@ -29,8 +29,11 @@
 
 case "${1}" in
    stop)
+      omit=$(pidof mdmon)
+      [ -n "$omit" ] && omit="-o $omit"
+
       log_info_msg "Sending all processes the TERM signal..."
-      killall5 -15
+      killall5 -15 $omit
       error_value=${?}
 
       sleep ${KILLDELAY}
@@ -42,7 +45,7 @@ case "${1}" in
       fi
 
       log_info_msg "Sending all processes the KILL signal..."
-      killall5 -9
+      killall5 -9 $omit
       error_value=${?}
 
       sleep ${KILLDELAY}