Refresh gpg keys at a random time

src/freedombone

@@ -5315,10 +5315,11 @@ function configure_gpg {
 
 function refresh_gpg_keys {
 	if ! grep -q "${PROJECT_NAME}-sec --refresh" /etc/crontab; then
+		GPG_REFRESH_TIME=$(( RANDOM % 60 ))
 		if [ -f /usr/local/bin/freedombone-sec ]; then
-			echo "0            */$REFRESH_GPG_KEYS_HOURS *   *   *   root /usr/local/bin/${PROJECT_NAME}-sec --refresh > /dev/null" >> /etc/crontab
+			echo "$GPG_REFRESH_TIME            */$REFRESH_GPG_KEYS_HOURS *   *   *   root /usr/local/bin/${PROJECT_NAME}-sec --refresh > /dev/null" >> /etc/crontab
 		else
-			echo "0            */$REFRESH_GPG_KEYS_HOURS *   *   *   root /usr/bin/${PROJECT_NAME}-sec --refresh > /dev/null" >> /etc/crontab
+			echo "$GPG_REFRESH_TIME            */$REFRESH_GPG_KEYS_HOURS *   *   *   root /usr/bin/${PROJECT_NAME}-sec --refresh > /dev/null" >> /etc/crontab
 		fi
 		systemctl restart cron
 	fi