Logoff ghost change - whites freepen if they haven't attacked anyone in last 15 min

This takes care of several issues:
1) Player logged by monster, nobody around to loot the item but it drops anyway (and disappears).
2) Player is walking around and his house loses power, or internet fault knocks out connection for 10+ minutes, item drops and disappears.
3) Player is jumped by PKs and has no chance to fight back, player was not hostile so he shouldn't drop the item.

My hope is that this will encourage players to build in more remote locations (since they could just log off when finished, provided they haven't attacked anyone), and encourage PKers to not use hold/blind/dazzle straight up on a builder, providing them a chance to fight back if they wish.

Murderers and outlaws of course do not receive the free pen.