New config language string:
- flightDeactivatedPVPMsg: shown when players enter combat while flying.

New:
- On join players who were in their own town and were flying when they logged off will a) have flying reactivated if auto-enable is true, or b) fall to the ground harmlessly.
- Players who are flying and enter into combat will have their attack canceled and their flight revoked.
- Servers with auto-enable set to true will find the plugins less spammy, with most messages showing only when the command to activate flight is manually used.