init: Add doc URIs to the systemd service files

These are used by systemctl help.

Signed-off-by: Ferenc Wágner <wferi@niif.hu>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>
(cherry picked from commit 8a940f9a18bdcdabef31f796e3572070e72d487b)

init/corosync-notifyd.service.in

@@ -1,5 +1,6 @@
 [Unit]
 Description=Corosync Dbus and snmp notifier
+Documentation=man:corosync-notifyd
 Wants=corosync.service
 After=corosync.service
 

init/corosync-qdevice.service.in

@@ -1,5 +1,6 @@
 [Unit]
 Description=Corosync Qdevice daemon
+Documentation=man:corosync-qdevice
 ConditionKernelCommandLine=!nocluster
 Wants=corosync.service
 After=corosync.service

init/corosync-qnetd.service.in

@@ -1,5 +1,6 @@
 [Unit]
 Description=Corosync Qdevice Network daemon
+Documentation=man:corosync-qnetd
 ConditionKernelCommandLine=!nocluster
 Requires=network-online.target
 After=network-online.target

init/corosync.service.in

@@ -1,5 +1,6 @@
 [Unit]
 Description=Corosync Cluster Engine
+Documentation=man:corosync man:corosync.conf man:corosync_overview
 ConditionKernelCommandLine=!nocluster
 Requires=network-online.target
 After=network-online.target