Update crontab for SMTP AUTH credentials

Scripts/sogo.cron

@@ -10,6 +10,8 @@
 #* * * * *      sogo	/usr/sbin/sogo-tool expire-sessions 60
 
 # Email alarms - runs every minutes
+# If you need to use SMTP AUTH for outgoing mails, specify credentials to use
+# with '-p /path/to/credentialsFile' (same format as the sieve credentials)
 #* * * * *      sogo	/usr/sbin/sogo-ealarms-notify
 
 # Daily backups