Try to start sge service if required

cluster/sge.enable.host.queue.sh

@@ -134,6 +134,7 @@ ${sge_hostname} is not the current host."
 	## List of process pattern to monitor
 	maco_proc_pattern="(/opt/maco/bin/maco.autoupdate.sh)"
 	apt_proc_pattern="(aptitude.*full-upgrade|/usr/bin/dpkg.*--configure|dpkg-deb|/bin/sh /usr/lib/needrestart/dpkg-status)"
+	sge_proc_pattern="(/usr/lib/gridengine/sge_execd)"
 
 	## List of files to monitor
 	file_nologin_path="/etc/nologin"
@@ -428,6 +429,13 @@ main() {                                                        # {{{
 		### Exit
 		is_proc_running "${maco_proc_pattern}" \
 			&& exit 0
+
+		## If nothing related to SGE is currently running
+		### Try to start the SGE execd systemd service
+		### Exit with error if the service can't start
+		is_proc_running "${sge_proc_pattern}" \
+			&& systemctl --quiet start sge_execd.service > /dev/null 2>&1 \
+			|| exit 4
 	fi
 
 	## Simple debug message with color to valid current variables
@@ -460,7 +468,7 @@ for host: ${RED}${sge_hostname:=/dev/null}${COLOR_DEBUG}."
 			### Exit with error
 			is_queue_disable "${sge_hostname}" "${loop_queue}" \
 				&& printf '%b\n' "${RED}ERROR ${loop_queue}@${sge_hostname} is still disable.${RESET}" \
-				&& exit 4
+				&& exit 5
 		fi
 
 	done