Add compatibility option to allow host authority

Add compatibility option to allow host authority

There are various bugs in the 2024.6.18 implementation of host-authoritive
multiplayer such that I can't recommend players to use it. Fixing these
issues on the server side is impossible, and I can't smell remotely if
clients have applied the necessary fixes. The currently known bugs
include at least:

- Unable to join more than 8 players in a room
- Unable for new players to join if host switched from host authoritive
  to server authoritive
- Host is unable to kill if it is in a host authoritive game while it
  thinks it is in server authoritive mode

If Innersloth fixes this mode in future game patches, this option may be
reconsidered.