Possible CPU consumption issue with FR24Feed and no ulimit set

[MaxWinterstein]

After we tackled the OOM issues (see e.g. #107) users using HomeAssistant OS 10 also had issues with CPU usage from FR24Feed.

The root cause is the same as the OOM issue, the removal/change of ulimit.

I did a fix in my repo by setting a ulimit also for FR24Feed- see MaxWinterstein/homeassistant-addons#151 (comment) and MaxWinterstein/homeassistant-addons#160

I am kinda confused about two things:

• Does this also happen for users of this repo? I can't believe it does not
• There is a property ULIMIT_N that is a system-wide setting according to the README, but in fact, it is just used for the thttp service.

My proposal on that would be to

• Change the ULIMIT_N to something like HTTP_ULIMIT_N and add a new FR24FEED_ULIMIT_N property. Maybe make the ulimit thing generic for all run files.