v1.5.7 - File permissions override

For server owners on POSIX-compatible systems (Linux and others), you can set the player-permissions config value to set the file permissions that the player data should have on saving to the shared directory. Minecraft versions up to 1.20.1 set read permissions to the group; this is no longer the case. This lets you revert this behavior. Don't use unless you know what you're doing, you could break the sync process!