A substitute for variable_del to avoid cache management
Use ONLY for variables setted during cron execution: elysia_cron_semaphore, elysia_cron_last_run, elysia_cron_last_context, cron_semaphore, cron_last
WARN_UPGRADE
A substitute for variable_set to avoid cache management
Use ONLY for variables setted during cron execution: elysia_cron_semaphore, elysia_cron_last_run, elysia_cron_last_context, cron_semaphore, cron_last
WARN_UPGRADE