Command line scripts do not allow an unlimited runtime causing timeouts

[TheWitness]

Describe the bug

Some CLI scripts need to become daemonized, and currently, the cli_check.php script will not allow them to set a max_execution_time of -1.

To Reproduce

Steps to reproduce the behavior:

1. Create a script that is intended to be daemonized

2. Set the max_execution_time to -1

3. Start the script. It will time-out at 300 seconds.

4. See error

Expected behavior

Daemonization should work.