I had to reinstall apache and libapache2-mod-php5.
That got the main max2play page up. However, it seems like the plugins directory has disappeared so all the tabs just give 404 response. I’m trying to see if I can retrieve the plugin directory from a backup.
EDIT the plugin directory is still there so I’m not sure what is causing the 404 error
EDIT2 Needed to enable mod rewrite
But quite why max2play crashed Apache like that, I don’t know.