Some site interruptions since updating to 0.12.2

Hi all,

The lemmy server process has been locking up at various points recently, sometimes to the point of no longer being able to service requests.

I don't know that it has anything to do with the latest version as the timing could just be coincidental, but, I have found some evidence that it's been too limited with it's file handles, so I've opened them up further.

Hopefully any apparent site outages stop at this point.