Achievements are saved in the state field, so we don't have room to save
friendlies there anymore. DZE_FriendlySaving is removed for now. I will
add it back later with a save to player profile instead.
The dayz_players variable is not used for anything. There were several
other unused variables in server_playerLogin.sqf.
It makes no sense to rename the identical DayZ PVs to have an E in their
name. I don't see any good reason it was done in the first place. All it
accomplishes is breaking script compatibility between the two mods and
requiring different publicvariable.txt filters. The only time it makes
sense is for custom Epoch variables that aren't used in vanilla.
All admins have to do to update custom scripts is swap the names
according to the change log.
Note I've submitted a pull request to replace PVDZ_veh_Save with
PVDZ_obj_Save in official too because they are duplicates.
