cloud-backup: add configurable random delay

cloud-backup

@@ -11,16 +11,23 @@
 :while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
 
 :global BackupPassword;
+:global BackupRandomDelay;
 :global Identity;
 
 :global DeviceInfo;
 :global LogPrintExit2;
+:global RandomDelay;
+:global ScriptFromTerminal;
 :global SendNotification;
 :global SymbolForNotification;
 :global WaitFullyConnected;
 
 $WaitFullyConnected;
 
+:if ([ $ScriptFromTerminal $0 ] = false && $BackupRandomDelay > 0) do={
+  $RandomDelay $BackupRandomDelay;
+}
+
 :do {
   # we are not interested in output, but print is
   # required to fetch information from cloud

doc/cloud-backup.md

@@ -18,9 +18,10 @@ Just install the script:
 Configuration
 -------------
 
-The configuration goes to `global-config-overlay`, this is the only parameter:
+The configuration goes to `global-config-overlay`, these are the parameters:
 
 * `BackupPassword`: password to encrypt the backup with
+* `BackupRandomDelay`: delay up to amount of seconds when run from scheduler
 
 Also notification settings are required for e-mail and telegram.
 

global-config

@@ -42,6 +42,7 @@
 :global BackupSendBinary false;
 :global BackupSendExport true;
 :global BackupPassword "v3ry-s3cr3t";
+:global BackupRandomDelay 0;
 # These addresses are used to send backup and config export files to.
 :global EmailBackupTo "";
 :global EmailBackupCc "";