Update to player build for;

1. Correct positioning over land or water.
2. Option to walk around the whole plot when building rather than being limited to 5 mtrs from build origin.
3. Walk around option can be turned off or on with a variable.
4. If no plot pole required then the 5mtr build range is retained (stops people running around with preview walls as bullet blockers).
5. 5mtr high limit from origin still in effect.
6. Allows an optional check for height above ground / sea max (prevent sky bases).
7. Can set max height to build plot poles (if 6. active).
8. Can set max height to build items that do not need plot poles (if 6. set).
9. Uses my new fn_check_owner.sqf to check ownership and friendly status (as take plot ownership does) - reduces code size in player_build.