Perf: Offline player lookup by name.

By searching only players who've been online recently, the search is
made MUCH faster without trading a great deal of RAM to get it.
Fix: Commands don't work with small claims.

Actually it depends on where you're standing (two edges have a problem).
Smaller claims mean you're more likely to be standing on a bad edge, so
smaller claims were more impacted.
Version to 9.0